Like – if it’s based on a person’s physiological responses, isn’t it possible that a response to a question like “did you murder your hamster” would register as a lie due to the increase in heart rate and blood pressure cause of anxiety associated with being accused of something?
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Another fucked up bit of trivia: although polygraph tests can’t be used as evidence in trial (unless all parties consent as some others have mentioned), they can be used as the basis for probationary decisions. So if you fail a polygraph test your PO can determine that you violated your probation whether you actually did or not.
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