I get that they aren't perfect. But, in the grand scheme of things I tend to believe if someone passes a polygraph they are more likely to be telling the truth than not.
The thing is, all this is he said-she said unless there is proof one way or the other. I'm just not real comfortable with the new climate (which in all fairness seems to be the opposite of the old climate) of women don't ever lie about this, so if they make an accusation it's true.
And my guess is if this were the opposite. If she took a polygraph and passed it, the reaction would be different.