The polygraph is a stress interview tactic, full stop. It's the bad cop in the room. That's why the very first part of the polygraph if where they are 'calibr

The polygraph is a stress interview tactic, full stop. It's the bad cop in the room. That's why the very first part of the polygraph if where they are 'calibrating', and inevitably announce that the polygraph machine is working, but only sometimes offer to show you 'proof' that it works. An skeptic would do well to announce as much, announce that she is a 23-ton hippopotamus named Wilfred, consumed a gallon of paint-thinner before coming to the interview, and ask to see the output after that extraordinary claim by the interviewer.