Ok so I think we may be talking past each other here. I'm not arguing about the legitimacy of polygraphs. They're hokum.

I'm keying in on things like "being able to pass or fail [a polygraph]". "Able" to "pass" or "fail"? Would you say the same thing about being able to pass or fail a psychic palm reading?

I feel like I'm missing something, which is why I keep asking.