Regardless of the argument that has long been going on over how accurate polygraphs are, that's kind of irrelevant. Dishonesty is what is prohibited. If you have some minor blemish, the government is typically okay with that as long as you admit it. You may not trust how they detect lying, but that's still what they're trying to find to base their decision on.
There isn't an argument. We know for a fact that polygraphs are not accurate at detecting lies.
They cannot effectively prohibit something they cannot detect. The polygraph being inaccurate pseudoscience means that they can't exercise the control that they pretend and purport to, as they simply cannot reliably determine if someone is being truthful or not.
Additionally, due to its inaccuracy, it makes the whole process wickedly unfair.
Who would want to work for an employer that gates your success as a team member on pseudoscientific nonsense?
