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The Science Behind Lie Detector Tests | How Do They Do It?
5:53
YouTubeDiscovery UK
The Science Behind Lie Detector Tests | How Do They Do It?
Find out the history of lie detectors, and how the modern polygraph machine works to catch people lying. Subscribe to Discovery UK for more great clips: http://www.youtube.com/subscription_center?add_user=DiscoveryTV Follow Discovery UK on Twitter: http://www.twitter.com/DiscoveryUK
231.6K viewsMar 31, 2018
Lie Detector Prank
Fake Lie Detector Exposes Her Secrets! 😂 #PrankGoneWrong
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LIE DETECTOR TEST Interview Prank on Mystery Neighbor (Ultimate Secret Truth Reveal)
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My Former Bosses Gave Me A Lie Detector Test
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