"Scanners Live in Vain" was a novelette-length story written by Creator/CordwainerSmith in 1945. After being rejected by ''Astounding Science Fiction'' and other major magazines it finally appeared in 1950 in the more obscure ''Fantasy Book'' magazine as Smith's first professional publication. It went on to be included in the first volume of ''The ScienceFiction Hall of Fame'' and in Robert Silverburg's ''Literature/ScienceFiction101''.

In TheVerse where this story takes place, mankind tried exploring space, but ran into a huge problem: Some unknown form of radiation permeated all of outer space, which would cause unbearable pain in anyone exposed to it for more than a few minutes. There was no known way to block this radiation. The only solution anyone could devise for this "Great Pain of Space" was to physically sever all the nerves that carried the pain signals to the brain. This procedure, invented by Dr. Haberman, rendered the patient incapable of feeling ''any'' sensation, good or bad, and of using any senses other than eyesight; so it was reserved for convicted criminals who would otherwise be sentenced to death.

Unfortunately, manning your starships entirely with convicted felons isn't the best way to run a space program, so these "Habermans" as they came to be known had to be watched closely by a volunteer police force who'd had the nerve-severing procedure done to them voluntarily. These volunteers had readouts and control panels mounted into their bodies, so that they could monitor their physical health and make sure they weren't (say) leaning against a running buzz saw without realizing it. They were trained to scan their readouts quickly and often, and so became known as Scanners.

One additional perk that Scanners had was the ability to temporarily ''bypass'' their severed nerves, and thereby experience hearing/smell/taste/touch like a normal person again, by plugging in a special wire invented by Eustance Cranch. The hero of the story, a Scanner named Martel, gets "cranched" to enjoy a little sensory vacation from the space service, but is called to an emergency meeting by the Scanners Confraternity while his cranch is still in effect. There, he learns that an Adam Stone has invented a way to eliminate the Pain of Space in normal people who don't have the Haberman cuts. The rest of the Scanners, who are in their normal unfeeling state of sensory deprivation, see this as a challenge to their "labor monopoly" and vote to have Adam Stone assassinated. Martel's cranched state, on the other hand, allows him to ''feel'' how morally wrong this is, and he decides to put a stop to it.

Conflict, confrontation, and artificially-induced high-speed battle reflexes ensue.

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!!This novelette provides examples of:

* ArtisticLicenseBiology: As pain is transmitted exclusively via the spinothalamic tracts and trigeminal nerves, it really shouldn't be necessary to sever the ''other'' neural pathways that carry hearing, scent, taste, proprioception, or tactile sensations to render someone immune to the Great Pain.
* BlessedWithSuck: The Scanners and Habermans are responsible for man's expansion into space. Unfortunately, this comes at the cost of their senses.
* CyberneticsEatYourSoul: Losing their senses led to a loss of empathy and morality in scanners, letting them coldly consider murder as a viable answer.
* {{Cyborg}}: The Scanners and Habermans.
* DisabilitySuperpower: Severing the sensory nerves makes you immune to the Great Pain.
* EvilCannotComprehendGood: A large part of the reason the Scanners vote to kill Adam Stone is that, in their Haberman state, they are incapable of realizing the outrage this will provoke among normal humans. Martel, who is still cranched at the time, recognizes that this could turn humanity against the Scanners.
* HumanPopsicle: Colonists who ''don't'' have the Haberman cuts are shipped to other planets in cold sleep, aboard starships crewed by Habermans and Scanners.
* HumanityEnsues: With his discovery having removed the need for Scanners, Stone works out how to undo the Haberman process, turning the Scanners back into humans. The regular Habermans, who were convicted criminals in the first place, are simply allowed to finally die.
* KarmaHoudini: [[spoiler:Martel kills fellow scanner Parizianski to keep him from murdering Dr. Stone. The others assume Parizianski's death was an accident, and it's implied that Martel's knowledge of what he really did will haunt him afterward.]]
* MurderIsTheBestSolution: When the scanners hear that Adam Stone may have discovered a cure to pain of space, they vote to kill him so as to not render their jobs obsolete.
* OrganicTechnology: [[spoiler:Adam Stone has basically discovered that the radiation that causes the Great Pain of Space not only ''affects'' life, it is ''absorbed'' by it. So, surrounding yourself with other living creatures will prevent you from feeling the pain yourself. He eventually settles on building a shield out of live oysters, since they lack any central nervous system to experience pain with.]]
* ProfessorGuineaPig: [[spoiler:Once Stone was certain of his cure, he himself rode a ship that utilized it, and emerged unharmed.]]
* ScienceMarchesOn: Human beings have been to space since the time this story was written, and although radiation hazards do exist in space, all of them can be shielded against and none of them cause appreciable pain.
** {{Revision}}: Likely a result of this, later stories don't mention the "Great Pain of Space" after this story. However, the stories don't contradict this tale either - the "pain" simply doesn't get mentioned again.
* SenseLossSadness: Martel laments being dead to his senses when working.
** LimbSensationFascination: When he's "cranched", he can appreciate sight, hearing, and taste again.
* SpaceMadness: The Great Pain of Space can drive a man to suicide, if he doesn't have the Haberman cuts to prevent him from feeling it.
* TitleDrop: Thrice in the story. The title refers Adam Stone's possible cure for the pain of space, which would render the entire caste of scanners to be useless.
* TokenGoodTeammate: Chang, another scanner and friend of Martel's, who is skilled enough to act normal even while in scanning mode and is the only other scanner to vote against Stone's assassination.
* TreacheryCoverUp: [[spoiler: After Martel saves Adam Stone from the Scanner assassin, Stone comes up with a cover story (out of gratitude to Martel) that leaves the Scanners with the respect and esteem they had earned with years of service and sacrifice instead of disgracing them as a pack of would-be assassins that tried to kill him to maintain their monopoly and the power that came with it]]
* UncannyValley: {{In-universe}}. Because scanners do not feel, they either lip-read or yell their speech, walk awkwardly, and cannot form convincing expressions. Martel doesn't notice how strange and repulsing this is until he observes them while cranched.
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