Kash Patel Is Polygraphing FBI Staff to Find Out if They’re Being Mean About Him
(www.thedailybeast.com)
People who use lie detectors as a machine they think can detect lies are stupid.
The real purpose of the lie detector is to trick the suspect into thinking it can detect lies, to the point where they confess.
Ancient trick. The voodoo magic chicken. "This chicken can tell all lies from truth, and it says you are lying." Who doesn't believe in voodoo magic? So the thief, knowing the jig is up, confesses.