I found the polygraph stuff disturbing. The fact that the NSA takes polygraphs seriously (despite presumably knowing there's little scientific evidence supporti

I found the polygraph stuff disturbing. The fact that the NSA takes polygraphs seriously (despite presumably knowing there's little scientific evidence supporting their use and knowing that lots of spies have had no trouble passing them) makes me think the NSA must be full of gullible morons. Does the NSA weed out polygraph non-believers during their hiring process? So far as I know, the main "valid" use of polygraphs is (a) to trick/intimidate people who believe in them into telling you a more thorough story, (b) to acquire a "scientific" seeming reason to do or believe what you already wanted to do or believe going in. I don't feel very reassured.