Lie Detector Test

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 Are Lie Detector Test  are accurate or not?

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Not

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The truth is a polygraph test can be passed by a guilty person (one with no conscience) and failed by an innocent person but if the tester can convince a guilty person of it's accuracy then sometimes a confession can be obtained. A polygraph cannot be used in a criminal trial in the U.S. but it can be referenced in a civil court hearing or trial. Because innocence cannot be proven by a polygraph test it is of little value to a person who is truly innocent. It's main value is to give investigators an indication as to whether or not they are on the right track.