>This tool does not make that any worse. If the false positive rate is too high and the prior probability a given person being interviewed actually lied, then

>This tool does not make that any worse. If the false positive rate is too high and the prior probability a given person being interviewed actually lied, then the test is actively harmful. I.e., if a positive result is more likely a false positive, then you end up wasting investigation resources. In this case you'd have been better off just flipping a coin to decide if someone warranted more investigation. >There will be truth-tellers who fail this test, but you find nothing conviction worthy. They'll be fine. Tell that to all the people who lost jobs, or spent months of their life under investigation because of failed polygraph tests.