And a placebo effect, perhaps? Not for the person using it, but for those who were tested. I imagine that some would not carry explosives anymore, afraid of bei

And a placebo effect, perhaps? Not for the person using it, but for those who were tested. I imagine that some would not carry explosives anymore, afraid of being detected. Some would change their behaviour and the soldier would also change, moving the magic-wand and "detecting" because both behaved inconciously different? Until it's known not to work, it might have really helped in some cases.