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I was wondering if any SF has been written, with the story focusing on the invention of a reliable lie detector. Already people are scanning the brain to see if people are telling the truth or lying. The initial use of lie detectors might be in law enforcement, courtrooms, and politics. As the lie detectors became cheaper and more mobile, it would become a must have for everyone, being used in the home and workplace.
Human beings are liars, therefore a reliable and portable lie detector has the potential to dramatically alter the functioning of society. Maybe laws will be enacted, to require consent before a lie detector can be used against you.
A telephone lie detector has been used on
British social welfare claimants. It probably
didn't really work but it frightened them,
which probably was the real intention. And it
may have indicated true statements as lies.
In the recent "Lost Fleet" novels, set quite a
long way in the future, lie detecting in
interrogation is sophisticated but not perfect.
It can register evasion and the intention to lie.
But it can be beaten.
In _The Stainless Steel Rat's Revenge_, the hero
beats a lie detector by deliberately feeling panic
before a question is asked, and feeling tired
before answering. He tells the reader that this
doesn't work when a lie detector is used properly
in a careful interrogation.
was involved with early electric lie detectors,
with his wife and another lady at the same time,
and with the comics character Wonder Woman, whose
magic rope makes you tell her the truth when she
ties you up with it. If these walls could talk, eh.