Expected in 2100 or later

A vast prize. Moving a whole star would decide the fate of every world around it, which is assumed here to mean saving or resettling whole peoples.

Who is paid. Only a government could fund work on that scale, and the large engineering firms that already hold such contracts would be paid to do it.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. A vessel the size of a small world carrying a whole society is an enormous building project.

Who is paid. Only a government could fund it, and the big shipbuilders and contractors already trusted with such work would be paid.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A vast prize. Giving a whole world air and a climate people can live in would open new land for a large share of humanity.

Who is paid. Only a government could fund work on a whole world, and the large engineering firms that already hold such contracts would be paid to do it.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A vast prize. A new world to live on would add living room for a large share of humanity.

Who is paid. No private buyer could fund a world, so a government pays and the large builders that already hold public works contracts collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. A place for many people to live and work beyond Earth is a building industry of its own.

Who is paid. A settlement is a public work a government pays for, and the big construction and space firms that already win such contracts would build it.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A vast prize. A new world to live on would add living room for a large share of humanity.

Who is paid. No private buyer could fund a world, so a government pays and the large builders that already hold public works contracts collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A vast prize. Carrying a whole world to a safer or better place would decide where a large share of humanity can live.

Who is paid. Only a government could fund work on a whole world, and the large engineering firms that already hold such contracts would be paid to do it.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A vast prize. Carrying a whole world to a safer or better place would decide where a large share of humanity can live.

Who is paid. Only a government could fund work on a whole world, and the large engineering firms that already hold such contracts would be paid to do it.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. A hollowed place for many people to live, lifted into orbit as a small moon, is a building project on the scale of an industry.

Who is paid. A settlement is a public work a government pays for, and the big construction and space firms that already win such contracts would build it.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. A working ship that carries people and cargo between worlds is the base of a whole transport industry.

Who is paid. Carriers buy ships, and a hull grown from a living line can be regrown by anyone who holds a cutting, so the established shipbuilders and carriers collect as with any other ship.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A vast prize. Lighting a new sun would give warmth and daylight to whole worlds, opening living room for a large share of humanity.

Who is paid. Only a government could fund work on a star, and the large engineering firms that already hold such contracts would be paid to do it.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. Calming a storm on a giant planet matters only to those who would work there, a niche.

Who is paid. It is assumed the firms mining that world pay for it as working gear, and makers of such equipment could copy it.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. A vessel carrying a whole population on a voyage of many lifetimes is an enormous building project.

Who is paid. Only a government could fund it, and the big shipbuilders and contractors already trusted with such work would be paid.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A vast prize. Giving a whole world air and a climate people can live in would open new land for a large share of humanity.

Who is paid. Only a government could fund work on a whole world, and the large engineering firms that already hold such contracts would be paid to do it.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

No prize. It is a word or a way of doing things that needs no new equipment, not a product.

Who is paid. Nothing is sold, so nobody pays and no seller collects.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A vast prize. A new world to live on would add living room for a large share of humanity.

Who is paid. No private buyer could fund a world, so a government pays and the large builders that already hold public works contracts collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A vast prize. A new world to live on would add living room for a large share of humanity.

Who is paid. No private buyer could fund a world, so a government pays and the large builders that already hold public works contracts collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. Warming cold ground so people can live on it would open new land, though it warms patches of ground and does not remake a whole world's air.

Who is paid. Making land livable is a public work a government pays for, and once the device was known the builders that already hold such contracts could copy it.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. A vessel the size of a small world carrying a whole society is an enormous building project.

Who is paid. Only a government could fund it, and the big shipbuilders and contractors already trusted with such work would be paid.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. A jail on a bare rock is a costly way to do what prisons on the ground already do.

Who is paid. Only a government runs prisons, and the contractors that already build and supply them would be paid.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A vast prize. Giving a whole world air and a climate people can live in would open new land for a large share of humanity.

Who is paid. Only a government could fund work on a whole world, and the large engineering firms that already hold such contracts would be paid to do it.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A vast prize. Giving a whole world air and a climate people can live in would open new land for a large share of humanity.

Who is paid. Only a government could fund work on a whole world, and the large engineering firms that already hold such contracts would be paid to do it.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. A place for many people to live and work beyond Earth is a building industry of its own.

Who is paid. A settlement is a public work a government pays for, and the big construction and space firms that already win such contracts would build it.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A large prize. An outpost at a strategic point between the stars is a very large building project.

Who is paid. A strategic outpost is assumed to be military, so a government pays, and the big builders that already hold defence and space contracts collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. Voyages to other stars are the same service as travel between worlds, a transport industry of its own for those who go and not a change for most people.

Who is paid. Carriers buy the ships and sell the passage, assumed here as with travel between worlds, and since ships can be copied the builders and carriers that already own fleets and ports collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. A vessel carrying a whole population on a voyage of many lifetimes is an enormous building project.

Who is paid. Only a government could fund it, and the big shipbuilders and contractors already trusted with such work would be paid.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A large prize. Travel to other stars would open them to trade and settlement, a transport industry of its own; it is a change for those who go, not for most people.

Who is paid. Ship operators pay for the drive, and once a firm had built it others could too, so established shipbuilders collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. A lift from the ground to orbit would slash the cost of reaching space for every firm that uses it.

Who is paid. Shippers pay to send cargo up, and since another line could be built once the first was shown to work, the gain is assumed to go to the large builders and the holders of the few good ground sites.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. A working ship that carries people and cargo between worlds is the base of a whole transport industry.

Who is paid. Carriers and other firms working in space buy ships, and since a second yard could build the same craft the established shipbuilders collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. A warm dry shelter is a local comfort for settlers on a rain-soaked world.

Who is paid. The shelters are assumed to be public refuges open to any settler, so a government pays, and ordinary building firms supply them.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. A world covered from end to end by city is a settlement at the largest scale, an enormous building project.

Who is paid. Residents and shopkeepers each pay for their own space in open air, as in any city, and the developers, builders and landowners already there collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. An engine that quickly reaches almost the speed of light would open other stars to trade and settlement, a transport industry of its own; it is a change for those who go, not for most people.

Who is paid. Ship operators pay for the drive, and once a firm had built it others could too, so established shipbuilders collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. A ship that can keep up hard thrust for long periods would cut travel times between worlds, a transport industry of its own.

Who is paid. Carriers and expedition firms buy ships, and many yards could build them once shown how, so established vehicle builders collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A large prize. Daily travel to work on other planets would change where many people can hold jobs.

Who is paid. The carrier buys the ship and workers buy fares from it, as with a liner, and since the ships could be copied the builders and carriers that already own fleets and ports collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

No prize. It is an event, crowded routes, not a product; the commuter craft are judged elsewhere.

Who is paid. Nothing is sold, so nobody pays and no seller collects.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A large prize. A ship that carries a whole community for generations is a vast building job, but a rare one.

Who is paid. Only a government could fund a voyage with no return, and the big shipbuilders that already hold public contracts would build it.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A vast prize. A new world to live on would add living room for a large share of humanity.

Who is paid. No private buyer could fund a world, so a government pays and the large builders that already hold public works contracts collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

No prize. It is a word or a way of doing things that needs no new equipment, not a product.

Who is paid. Nothing is sold, so nobody pays and no seller collects.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A large prize. A starship that gathers its fuel as it flies would found a transport industry between the stars.

Who is paid. Carriers and expedition firms buy ships, and many yards could build them once shown how, so established vehicle builders collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. An uncrewed probe sent to another star gathers knowledge, which is valuable but which nobody buys as a product.

Who is paid. The findings cannot be charged for, so a government pays, and the builders that already hold science contracts supply it.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. A slow ship carrying people between stars is an enormous building project, assumed here to carry settlers and not paying passengers.

Who is paid. Only a government could fund a voyage with no return for so long, and the big shipbuilders and contractors already trusted with such work would be paid.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. A network that carries messages between stars would be the only link between settled worlds, an industry of its own.

Who is paid. Those who send messages pay the network, and since others could build such craft the gain goes to whoever already runs the relays.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. Unlike a launch track open to all cargo, this is a landing aid built into a lone giant structure.

Who is paid. Whoever pays for the great structure pays for this, assumed to be a government, and its established builders supply it.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

No prize. As described it is a layout of worlds, not a thing made or sold; if the story means the worlds were moved into place, it would be judged as a built world instead.

Who is paid. Nothing is sold, so nobody pays and no seller collects.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. Shades that give a built world day and night are a part of that giant structure, not a product of their own.

Who is paid. Whoever pays for the great structure pays for this, assumed to be a government, and its established builders supply it.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. A field that gathers fuel from the space between stars would free a starship from carrying its own, changing the cost of the longest voyages.

Who is paid. Ship operators pay, and once the engine was shown to work others could build it, so established engine builders collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. A slow ship built to settle distant worlds is an enormous building project.

Who is paid. Only a government could fund a voyage with no return for so long, and the big shipbuilders and contractors already trusted with such work would be paid.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A vast prize. Giving a whole world air and a climate people can live in would open new land for a large share of humanity.

Who is paid. Only a government could fund work on a whole world, and the large engineering firms that already hold such contracts would be paid to do it.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. Materials taken from other worlds and from loose rock in space would feed an industry of their own.

Who is paid. Firms that need the material pay for it, and since others could dig the same way the gain goes to those who already own the ships and claims.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. A probe carrying living material is assumed to be a rare science or seeding mission.

Who is paid. Nobody could be charged for such a mission, so a government pays the probe builders that already hold such contracts.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. An engine that gathers its fuel on the way would make travel to other stars possible.

Who is paid. An engine is bought by whoever runs the ship, assumed here to be carriers as with other drives, and established engine builders could copy it once it worked.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A vast prize. Food made from ice with no fields at all is the same promise as any food factory, and would feed a large share of humanity.

Who is paid. What is sold is food, so people are assumed to pay in the end, and once such a plant worked others could build their own, so the firms that already own ships and food plants collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. A creature that reshapes the surface of a moon by itself would change the cost of preparing a world for people.

Who is paid. Remaking a moon is a public work a government pays for, and a creature that breeds can be raised by others once any stock exists, so the firms that already win such contracts collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. Pushing ships with light from home would let them reach other stars without carrying fuel, opening a transport industry of its own.

Who is paid. Whoever runs the ships pays for the push, assumed here to be carriers, and others could build such lasers, so the owners of the power and sites collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. A ship that grows by itself would found a transport industry as other ships would.

Who is paid. Carriers buy it, and a tree sets seed, so once such ships exist other growers could raise them and the established shipbuilders and carriers collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A vast prize. Giving a whole world air and a climate people can live in would open new land for a large share of humanity.

Who is paid. Only a government could fund work on a whole world, and the large engineering firms that already hold such contracts would be paid to do it.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. A creature that spins large structures in orbit would change the cost of building in space.

Who is paid. Builders in space pay for its work, and a creature that breeds can be raised by others once any stock exists, so the established space builders collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. An aircraft for the skies of a giant planet serves a few expeditions, a niche.

Who is paid. No user is named, so it is assumed that firms working on other worlds buy it like other working gear, and established aircraft builders could all make it.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. One computer the size of a world could answer questions no smaller machine could, though it serves whoever owns it and not everyone.

Who is paid. I assume only a government could pay for such a work, and since size alone does not stop others building one the firms that already build large works for governments collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A vast prize. Going on existing after death is something nearly everyone would want above almost anything else.

Who is paid. People would pay all they could, and I assume a mind once kept running by one firm cannot easily be moved to another, so the first to offer it holds its customers.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. The densest computer that matter allows would change the cost of all computing.

Who is paid. Firms that need computing pay, and I assume others could learn to make such matter in time, so the firms that already sell computing to every business collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. A hub that passes messages among the planets would be the telegraph exchange of a settled solar system, assuming many people live out there.

Who is paid. Firms trading between worlds pay by the message, the description does not say the spot is the only one that would serve, so a rival hub could be built, and the carriers and fleet owners who already hold the home networks and the ships to tend a station collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. Understanding any spoken language at once would remove a cost from travel, trade and every job done across borders.

Who is paid. People buy one each, and since it is a creature that breeds, anyone can raise and sell them, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A large prize. A city that repairs and defends itself for ages would be a great public work, judged as built for one people only.

Who is paid. A government would pay for it, and the large builders that already win public works contracts would be paid to raise it.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

No prize. Robots that copy themselves and obey no human rules are a rival people, not a product anyone can buy or use.

Who is paid. Nothing is sold, so nobody pays and no seller keeps anything.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A vast prize. A spare body that takes a copy of its owner would let most people be in several places at once for work and errands.

Who is paid. People buy the blanks for themselves, and assuming others could learn to make them the large makers with factories and shops collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. Expert care for children at home would be worth an industry of its own.

Who is paid. Families buy it, and since they are assumed to trust only known names with their children the established makers with strong brands collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A vast prize. A made body that a stored person can be loaded into would let people outlive their first body, which changes how most people live; it is assumed the loading works.

Who is paid. People buy bodies for themselves, and since many could grow or build them the firms with factories and trusted names collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. Putting people safely into long dormancy would make very long journeys possible and give hospitals time to treat the gravely ill.

Who is paid. I assumed carriers and hospitals buy it; the method could be copied once known, so the firms that already run ships and hospitals collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

No prize. The description gives the remade animals no use that a buyer would pay for, unlike made creatures bred for work or as servants, so there is nothing to price.

Who is paid. Nothing is sold, so no seller keeps anything.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. Putting people safely into long dormancy would make very long journeys possible and give hospitals time to treat the gravely ill.

Who is paid. I assumed carriers and hospitals buy it; the method could be copied once known, so the firms that already run ships and hospitals collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. The story promises only a little energy from sunlight, which is a curiosity beside ordinary food.

Who is paid. I assumed people buy it for themselves from clinics; the method could be copied, so clinics already offering such treatments collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. Speeding up evolution would let breeders and laboratories get new living things quickly.

Who is paid. I assumed breeders and laboratories buy it; once the machine existed other equipment makers could copy it, so established laboratory suppliers collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. Growing a person to adulthood very quickly would let a state fill its ranks at will, which no family would want for a child.

Who is paid. I assumed a government runs it, since the description does not say who would; the method could be copied, so the laboratories and suppliers serving it collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. Creatures bred for heavy work would change the costs of building, mining and hauling.

Who is paid. Firms would buy them for labour, and living stock can be bred on by whoever holds some, so established breeders and suppliers collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. Sleeping through a very long voyage would make such journeys possible, as with other forms of long dormancy.

Who is paid. I assumed carriers buy it for their crews; unlike a sleep chamber this is a drug, which is protected from copying for a while, so its maker keeps what is left.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. The name is of the people, so the thing judged is the making of servants from animals, which would give a state its workforce to order, though few societies would allow it.

Who is paid. I assumed the state runs the making, as with other ways of turning out people to order; the method could be copied, so the laboratories and suppliers serving it collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. Fitting settlers to eat local plants serves a narrow group; judged as the treatment that makes the change.

Who is paid. Settlement ventures pay, and established medical firms collect since others could offer the same treatment.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. It serves only people who work in space, which is a niche.

Who is paid. I assumed employers and space carriers buy it for their crews; a new drug is protected from copying for a while, so its maker keeps what little is left.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. Shaping settlers for hostile worlds would be worth a whole programme of settlement.

Who is paid. A government pays because it seeds whole peoples, unlike a treatment for a few settlers, and its usual contractors collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A vast prize. A fresh healthy body for the same mind answers the deepest need there is, and nearly everyone would want it.

Who is paid. People would pay for themselves; I assumed it is a procedure other clinics could learn and not a protected drug, so established hospitals collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. Letting families go on speaking with the newly dead is something a great many would pay for.

Who is paid. Families would pay for the keeping, and I assumed the chambers can be copied, so established funeral firms with premises and trust collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. The name is of the person, so the thing judged is the engineering that lets a person change appearance and pass as someone else, which serves a narrow trade in spying.

Who is paid. I assumed spy services are the buyers, so a government pays; the description does not say the method is a secret, so the firms that already hold such contracts collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. Keeping the dead within reach of their families would be worth an industry of its own.

Who is paid. Families pay for the keeping, and firms that already run death care and cold storage collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. Operated bodies are a banned niche; assumed a few firms use them for promotion.

Who is paid. Firms pay, and established makers of implants collect since the fittings can be copied.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

No prize. It is done to a person without their say, to hurt them, break their mind or override their will or body, which no one may lawfully buy or use.

Who is paid. Assuming it is outlawed for everyone, governments and employers included, nothing is sold.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A vast prize. Holding off old age meets about the deepest need there is, and nearly everyone alive would want it.

Who is paid. People would buy it for themselves, and I assumed it is a new medicine protected from copying for a long while, so its maker keeps much of the gain.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. The name is of the person, so the thing judged is the surgery and gene work that fit a body for open space, which serves the few who work there.

Who is paid. I assumed firms working in space pay for their crews; other surgeons and laboratories could learn the work, so established clinics collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. I assumed it serves the few people who choose to live in open space, which is a niche.

Who is paid. The people who wear it would pay, and a living partner can be bred on by others, so established breeders and suppliers collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A vast prize. Holding off old age meets about the deepest need there is, and nearly everyone alive would want it.

Who is paid. People would buy it for themselves, and a new medicine is protected from copying for a long while, so its maker keeps much of the gain.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. A living room answering to one mind is a curiosity; I assumed a few wealthy owners would want one.

Who is paid. The owner would pay, and living tissue can be grown on by others, so established growers of such tissue collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. The name is of the person, so the thing judged is the breeding of people made for labour, which would give a state its workforce to order, though few societies would allow it.

Who is paid. I assumed the state runs the breeding, as with other ways of turning out people to order; the method could be copied, so the laboratories and suppliers serving it collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. The name is of the person, so the thing judged is the engineering of a child's genes before birth, which many parents would pay dearly for.

Who is paid. I assumed parents pay; the methods could be copied, so established fertility clinics collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. It serves only people who work under the sea, which is a niche.

Who is paid. I assumed diving and undersea firms pay to fit their workers; other makers could copy the implant, so established makers of medical devices collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

No prize. The description gives the creature no use that a buyer would pay for, unlike made creatures bred for work, organs or company, so there is nothing to price.

Who is paid. Nothing is sold, so no seller keeps anything.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. The story promises only a little energy from sunlight, which is a curiosity beside ordinary food.

Who is paid. I assumed people buy it for themselves from clinics; the method could be copied, so clinics already offering such treatments collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. A machine body for a living brain would give the dying more years, though few would choose such a life.

Who is paid. The dying and their families would pay, and hospitals and makers of medical machinery could copy it and collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. A giant machine driven by a living brain is above all an engine of war or heavy work.

Who is paid. Unlike the plain brain in a metal body, I assumed an army buys this giant, and the firms that already build its war machines could copy it and collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. A mechanical body for a living brain would be an industry of its own for the dying and the badly injured.

Who is paid. People would pay to go on living this way, and the hospitals and makers of bodies that already have the surgeons and workshops would collect, since the method itself can be copied.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A vast prize. Loading great stores of knowledge straight into the brain would replace years of schooling and training for most people.

Who is paid. Learners and families would pay for it themselves, and once a first firm had built it others could copy it and many could supply the lessons, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. Keeping a brain alive and able to talk after the body fails would be an industry of its own for the dying.

Who is paid. People would pay to go on living this way, and the hospitals that already have the surgeons and life-support wards would collect, since the method could be copied.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

No prize. I took this to be a merged way of being for a group of people, with no made device named, so not a thing that can be made and sold.

Who is paid. Nothing is sold, so nobody pays and no seller keeps anything.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

No prize. It is a creature that preys on people, a hazard and not something made to be sold.

Who is paid. Nothing is made or sold here, so there is no buyer and no seller.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

No prize. I took this to be a shared way of being for many minds, with no made device named, so not a thing that can be made and sold.

Who is paid. Nothing is sold, so nobody pays and no seller keeps anything.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. Moving many times faster than normal would be worth an industry of its own to fighters, athletes and manual workers.

Who is paid. I assume people buy the surgery for themselves, though armies would want it too, and the hospitals that already have the surgeons would collect since the operation could be copied.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A vast prize. Putting knowledge straight into the brain would replace years of schooling and training for most people.

Who is paid. Families and learners would pay for it themselves, and once one firm had built the gear others could copy it and many could write the lessons, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. Talking with the stored minds of the dead is precious to the bereaved, but the worth lies in storing the mind, and this is only the telephone to it.

Who is paid. Families would pay, and I assumed the stored minds already exist, so the talking device alone is easy to copy and no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A vast prize. Writing a book straight into memory would replace years of study for most people.

Who is paid. Learners and families would pay for it themselves, and once a first firm had built it others could copy it and many could supply the lessons, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. Talking with relatives kept in cold storage is a comfort for the bereaved and little more.

Who is paid. Families would pay to hear from their own kin, and the amplifier could be copied by many makers, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

No prize. It is done to a person without their say, to hurt them, break their mind or override their will or body, which no one may lawfully buy or use.

Who is paid. Assuming it is outlawed for everyone, governments and employers included, nothing is sold.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A vast prize. Taking on a skilled person's knowledge by injection would replace years of schooling and training for most people.

Who is paid. Learners would pay for the shots themselves, and assuming the tissue can be grown in bulk many makers could supply them, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A vast prize. Keeping a copy of a mind so the person can be brought back would take away the finality of death for anyone who could have it.

Who is paid. People would pay for themselves and their families, and once one firm had done it others could, so the hospitals and medical firms people already trust would collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. Capturing and passing on your own thoughts for a while is a convenience for reports and records.

Who is paid. It is swallowed, so I assume the wearer is willing and buys it; many makers could copy it, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. Pulling memories out of an unwilling head would change how crimes are solved and secrets are kept.

Who is paid. A probe of brain tissue is done to a subject, so I assumed the buyers are police, courts and spy services, and the firms that already supply them could copy the machine and collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. It only matters to people who hold secrets someone would probe for.

Who is paid. The keeper of the secret takes it willingly, so I assume people buy it for themselves, and a drug whose recipe is known can be made by many, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. This names a person, but the implant behind it, a machine doing the work of a brain, would restore people whose brains had failed.

Who is paid. I judged the implant: patients and their families would pay, and the makers of medical implants could copy it and collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A vast prize. Loading a stored mind into a regrown brain is the restoring step of bringing a person back, which takes away the finality of death.

Who is paid. People would pay for themselves and their families, and once one firm had done it others could, so the hospitals and medical firms people already trust would collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A vast prize. Sending copies of yourself out to do the day's work would change how most people work and live.

Who is paid. People would buy blank bodies again and again, and once the copying was known the factories able to turn out blanks in bulk would collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A vast prize. Keeping a copy of a mind so the person can be brought back would take away the finality of death for anyone who could have it.

Who is paid. People would pay for themselves and their families, and once one firm had done it others could, so the hospitals and medical firms people already trust would collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. A therapist who can enter and shape dreams could treat troubles of the mind that talk alone does not reach.

Who is paid. Clinics and therapists would buy the machine, and the makers of medical equipment who already sell to them could copy it and collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. Fast capsules in sealed tubes would rival trains and aircraft on their routes, which changes the cost of travel between cities; this one runs under the ocean.

Who is paid. Governments pay for a public way of this size, and the large builders that already hold such contracts collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. A tunnel under the ocean would link continents by land, which changes the cost of travel and trade between them.

Who is paid. Governments pay for a public way of this size, and the large builders that already hold such contracts collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. An aircraft that flies very fast with almost no limit on range would change the costs of long-distance flight.

Who is paid. Airlines and freight carriers buy the aeroplane, and it is judged as a craft, not as its power source, so the aircraft makers that already build and service fleets collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. A fall through the Moon would be a quick way between its far sides for the few people living there.

Who is paid. A government pays for a boring of this size, and the large builders that already hold such contracts collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. Trains that fall through deep tunnels would cross long distances fast on little fuel, changing the costs of long-distance travel.

Who is paid. Governments pay for tunnels on this scale, and the tunnelling and railway builders that already hold such contracts collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. Trains that fall through deep tunnels would cross long distances fast on little fuel, changing the costs of long-distance travel.

Who is paid. Governments pay for tunnels on this scale, and the tunnelling and railway builders that already hold such contracts collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. A living animal bred to carry riders does a car's job more slowly, so I judge it a curiosity.

Who is paid. People buy it as they would a car, and since living stock multiplies once any of it is sold, no originator can hold it, so the breeders and vehicle dealers that already hold stock, workshops and showrooms collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. A car that is grown and not built is a curiosity beside the ordinary car unless it is much cheaper, which the description does not say.

Who is paid. People buy it as they would a car, and since living stock multiplies once any of it is sold, no originator can hold it, so the breeders and vehicle dealers that already hold stock, workshops and showrooms collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. Sunlight gathered near the sun and sent to cold planets would supply whole settlements that have no other source.

Who is paid. Only governments could fund a work this size for whole settlements, and whoever builds the one station controls a supply nobody else can match.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A vast prize. Catching the whole output of a star would give a civilisation more energy than it could ever otherwise have.

Who is paid. Only a government could fund it, and whoever builds the one swarm controls a supply nobody else can match.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. Collecting the stronger sunlight nearer the sun would supply whole settlements with power.

Who is paid. Only governments could fund a work this size for whole settlements, and whoever builds the one station controls a supply nobody else can match.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. A hub that routes power to settlements on many planets is what makes their whole supply usable.

Who is paid. Only governments could fund a work this size, and whoever builds the one hub controls a link nobody else can match.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. A plant near the sun sending power to distant worlds would supply whole settlements that have no other source.

Who is paid. Only governments could fund a work this size for whole settlements, and whoever builds the one station controls a supply nobody else can match.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. Judged as a fuel that can be held safely, nothing would pack more energy into less weight, which is worth an industry of its own.

Who is paid. A substance this dangerous is assumed to be bought only by governments, and whoever can make and hold it controls something others cannot get.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. Assuming the beams deliver power and are not a weapon, joining beams from several worlds would supply a place with no other source.

Who is paid. Only governments could fund a work this size for whole settlements, and whoever builds the one station controls a supply nobody else can match.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. Mirrors that warm and light a whole planet would make it fit to settle.

Who is paid. Only a government could fund it because nobody can be charged for sunlight one by one, and whoever builds the mirrors controls them.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. True invisibility would be worth a great deal to armies and spies, and would likely be kept from ordinary buyers.

Who is paid. Armies and spy services pay, and the firms that already hold their equipment contracts would make it once the method is known.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. True invisibility would be worth a great deal to armies and spies, and would likely be kept from ordinary buyers.

Who is paid. Armies and spy services pay, and the firms that already hold their equipment contracts would make it once the method is known.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A vast prize. Copying any object exactly would make most goods nearly free, changing how nearly everything is made.

Who is paid. Assuming a home or shop machine, people buy it, and a machine that copies anything can copy itself, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. A living glove is a curiosity or a piece of protective wear for a few; the description names no wider use.

Who is paid. People buy it for themselves, I assume, and living creatures breed and spread, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A vast prize. Building finished goods from atoms to a plan would change how nearly everything is made.

Who is paid. Assuming a home or shop machine, people buy it and its feedstock, and a machine that makes anything can make more of itself, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A vast prize. Tiny machines that turn nearby matter into any chosen item would make most goods nearly free.

Who is paid. People buy it for themselves, assuming it is sold for home use, and a thing that makes anything makes more of itself, so no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

No prize. By the description these machines copy themselves and spread over the whole world unaided, so whatever good they do in the story reaches everyone free and there is nothing anyone would pay for.

Who is paid. Nothing is sold: unlike the make-anything machines, which someone must first buy, these arrive by themselves, so nobody pays and no seller keeps anything.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

No prize. It is a wasteland of runaway tiny machines, a hazard and not a product.

Who is paid. Nothing is sold; people avoid it.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A large prize. A package that builds a whole vehicle from local materials would upset vehicle making and shipping wherever a finished vehicle is costly to deliver, but it makes vehicles only.

Who is paid. The description names no buyer, so I assumed the buyers are firms working far from any factory, such as mines, expeditions and settlements, because building from local raw resources matters most where a finished vehicle cannot easily be brought; and unlike the pattern machine aboard ships a seed is used up in building and is not said to make more seeds, so vehicle firms with designs and brands collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. Assuming a soldier carries it, a gun that throws splinters faster than any other still does the job guns already do.

Who is paid. Armies buy it with public money, and assuming rival makers learn to copy it the established arms suppliers with standing army contracts collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. Carried in the hand, it does much the same job as a gun, so the gain over a gun is modest.

Who is paid. Armies buy it with public money, and since rival makers can copy it the established arms suppliers with standing army contracts collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. A beam weapon carried in the hand does much the same job as a gun, so the gain over a gun is modest.

Who is paid. Armies buy it with public money, and since rival makers can copy it the established arms suppliers with standing army contracts collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. Assuming a soldier carries it, it does much the same job as a gun, so the gain over a gun is modest.

Who is paid. Armies buy it with public money, and since rival makers can copy it the established arms suppliers with standing army contracts collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A large prize. Assuming wars are fought in space, warships for it would be an industry of their own.

Who is paid. Only governments field war fleets, and the few yards already able to build large spacecraft would win the orders.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. A weapon that can wreck a region or a world is worth a great deal to a state as a threat that keeps others from attacking, though it feeds or houses no one.

Who is paid. Only governments pay for it, and as with nuclear arms only the handful of builders a state allows near such a weapon may make it.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. A weapon that can wreck a region or a world is worth a great deal to a state as a threat that keeps others from attacking, though it feeds or houses no one.

Who is paid. Only governments pay for it, and as with nuclear arms only the handful of builders a state allows near such a weapon may make it.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. Assuming wars are fought in space, warships for it would be an industry of their own.

Who is paid. Only governments field war fleets, and the few yards already able to build large spacecraft would win the orders.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. A piloted armoured war machine of that size would be a new class of weapon on the scale of tanks or warplanes.

Who is paid. Armies pay, and only the heavy arms builders with yards, factories and contracts could turn them out, though any of them could.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A large prize. A heavy beam or a weapon fired from orbit lets a state strike or defend across great distances and would take a large share of what it spends on arms.

Who is paid. Only governments pay, and the few shipyards and space builders that already hold such contracts are the ones able to deliver it, so they collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A small prize. A weapon built into the body appeals to a few bodyguards, soldiers and enthusiasts and stays a niche.

Who is paid. Assuming it is legal to buy as in the story, individuals pay for themselves, and the clinics and surgeons already able to do such work collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. A single identity card for everyone is useful to the authority that issues it but is only a card.

Who is paid. Whoever issues the credential pays, assumed here to be a state, and the firms that already make official papers and registers collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A vast prize. A kitchen machine that builds any dish from raw chemicals would end both farming and cooking for most households.

Who is paid. Households buy the machine for the kitchen, and being strange does not make it hard to copy, so once it exists many firms could build it and no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A vast prize. Choosing the weather over wide areas would change farming, flood and drought for most people.

Who is paid. Nobody can be charged one by one for weather, so governments pay, and I assumed the power source it needs is hard enough that the first builder holds it alone.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

No prize. This is a plant in a story and not something anyone could build or sell.

Who is paid. Nothing is sold, so nobody pays and no seller gains.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A large prize. It is ordinary farming at the scale of a planet, feeding one crowded world, so it is a very big trade but not a new way of living.

Who is paid. The people of the crowded world buy the food, and farming is easy to copy, so whoever already owns the land and the freight ships collects.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. Plants that make a thin alien air breathable would open a whole world to settlers, though few people would live there for a long time.

Who is paid. A government pays to seed a whole world, and since living stock multiplies once any of it is sold, no originator can hold it, so the growers and contractors that already hold such public works contracts collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. A zoo of creatures from many worlds is an attraction people visit for pleasure.

Who is paid. I assumed visitors buy tickets, and whoever holds animals that nobody else can get keeps what is left.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. A large settlement on the seabed would open new living space, though few would need to live there.

Who is paid. Unlike a town inside a building on ordinary land, the dome and seabed works shelter everyone at once and no resident could be charged singly for them, so I assumed a government pays and the big building firms that already hold such contracts collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. It makes coffee, which ordinary heat already does well.

Who is paid. Households buy it, and the story has it sold freely, so I assumed any appliance maker may buy the radioactive source and build the same thing, and no seller keeps much.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. A world wholly built over houses a great many people, but it is ordinary city building repeated everywhere.

Who is paid. Households pay for homes in it, and since anyone can put up buildings, those who already own the land collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. A sealed home at the top of an immensely tall tower is a luxury for a few.

Who is paid. Rich households buy it, and I assumed more than a lone tower could be built, so developers with land and money collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. A home that is bred and not built would cut the cost of housing, assuming it is cheap to raise.

Who is paid. People buy it as a home, and since living stock multiplies once any of it is sold, no originator can hold it, so the growers, builders and landowners that already hold stock, sites and the trade of housing collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. A block of flats that hovers a little above the ground gives its tenants nothing much that a grounded block does not.

Who is paid. A developer pays for it as a showpiece, and the large builders who already put up such blocks would do the work and collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. A living bed is a comfort and a curiosity, and many would dislike sleeping on an aware creature.

Who is paid. People buy it for the home, and since living stock multiplies once any of it is sold, no originator can hold it, so the breeders and furnishing shops that already hold stock and showrooms collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. Ending the seasons is a public work whose gain the description does not name, and the story's promise leaves out the harm to coasts and climates.

Who is paid. Only a government could pay for a work on the whole planet, and the firms that already build its great works collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. A globe-circling beam of antimatter has no everyday use, so it is judged as a single weapon or public work.

Who is paid. Only a government could pay for something so large, and the firms that already build its great works collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A large prize. A new source of power would change the cost of energy, though the description does not say how much it gives or how safely.

Who is paid. I assume a thing this dangerous would be a public work, with a government paying established power-plant builders, and others able to copy it once shown.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. Steering clouds between the stars would matter only if one threatened the sun or the Earth.

Who is paid. Only governments would pay for such protection, and their established space contractors would build it.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

A small prize. A prison off the Earth holds prisoners no better than one on the ground, so it is a niche.

Who is paid. A government pays, and since a cell block is easy to copy, the firms that already fly the supply ships collect.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

No prize. A court is part of the law, not a product.

Who is paid. Nothing is sold, so nobody pays and no seller keeps anything.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A large prize. A whole world of leisure would be an industry of its own.

Who is paid. Holidaymakers pay, and whoever holds the planet holds a place others cannot get.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

No prize. This is a name for a kind of person, not a thing that can be built or sold.

Who is paid. Nothing is sold, so nobody pays and no seller keeps anything.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.

A large prize. Reliable forecasts of where a whole society is heading would be worth a great deal to those who govern.

Who is paid. Governments pay, and I assumed the method and its records stay in the hands of those who worked it out, so others cannot copy it.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is not very sure of this one.

No prize. Tearing down a ruined city to farm its ground is an event in the story, not a product.

Who is paid. Nothing is sold, so nobody pays and no seller keeps anything.

A model's judgement, not a reading, of the idea as if it worked the way its story promises. The model is fairly sure of this one.