Polygraphs are a deterrence against weak-willed people. If you're so weak to crack to a machine that measures sweat, heart rate and breathing - you'd probably b

Polygraphs are a deterrence against weak-willed people. If you're so weak to crack to a machine that measures sweat, heart rate and breathing - you'd probably break some foreign actors. It's basically govt LARPing, but for interrogating hires. The vast majority of people that do polygraphs believe it works, so it's not so useless.