[awakeasleep]

Everyone repeats this old canard but no one has any evidence even anecdotes to show that a polygraph machine is better than any other way to head fake someone in an interrogation

[lazide]

Why would it have to be better to still be used?

[Conan_Kudo]

If people believe it, that's enough. It doesn't have to be good, it just has to mess with people enough.

[IAmBroom]

It's dumber than that.

If the people telling the interviewers to use polygraphs believe the suspects will believe in polygraphs, it's enough.