Hey TNT,
I don't know the environment you give your polygraph tests, but I have had the opportunity to study the polygraph, and that unless you give the test in a controlled environment, with certain and very limited number of items in the room. I studied this as a result of my managing a grocery stores several years ago. We did this because we used the polygraph to help us with in store thefts.
Finally, it is also proven that sociopaths clearly can pass any polygraph, not to mention those who are just compulsive non-truth tellers. I have a sister, who tells nothing but the truth... honest. The problem is her truth keeps changing. She truly belives what she says is the truth, but it changes everytime she tells something.
All in all, a poly will catch an honest person trying to pass the test who is being dishonest, but the truly dishonest will always be able to pass the test.
Danny



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