The bigger problem is that it just doesn't work Even if we posit that we can be extra-rough in screening because we need the best for $GOOD_ENOUGH_REASON. The

The bigger problem is that it just doesn't work Even if we posit that we can be extra-rough in screening because we need the best for $GOOD_ENOUGH_REASON. The "bad guys" know that the polygraph is nearly worthless. They know what's theatre and what's not. So you don't apply any pressure to them. They know that placating you with your pat questions is the solution and they calmly work toward that. So your chance of success against anyone "worth worrying about" is nearly zero. But the people who will crack, and probably have a nearly unending closet of real and semi-real stories, are the innocent people. This isn't just collateral damage, but now you're wasting time investigating people who are almost certainly not the bad guys. And reducing your labor pool...