Wait, you need to take a polygraph test to get into an INTELLIGENCE AGENCY and you aren't supposed to know how a polygraph works? If you do actually know how it works, you'll be more nervous about false positives than about any actual lying you might try to get away with. I guess it'll eliminate anxious candidates very efficiently, but doubtful those who already lie convincingly. Polygraphs don't sorta work, intimidation sorta causes predictably abnormal behavior. I'm glad we as a people have moved past superstition.