Polygraph (duplicating device) - Wikipedia
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Stoelting Ultrascribe Polygraph Instrument Vintage Lie Detector as Is for sale online | eBay
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:focal(531x277:532x278)/https://tf-cmsv2-smithsonianmag-media.s3.amazonaws.com/filer/48/76/48764aec-34b0-48f6-b70c-761084ca333f/lie_detector_test.jpg "Lie Detectors Don't Work as Advertised and They Never Did | Smart News | Smithsonian Magazine")
Lie Detectors Don't Work as Advertised and They Never Did | Smart News | Smithsonian Magazine
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