> Most people believe that polygraphs have some amount of validity They have a much higher rate of false positive than false negative. That makes them useful i

> Most people believe that polygraphs have some amount of validity They have a much higher rate of false positive than false negative. That makes them useful in circumstances where your primary concern is, say, eliminating risky hires for jobs accessing sensitive data -- you may lose lots of good candidates, but your concern isn't fairness.