I always try to avoid making a guess on someone's credibility in these situations. Such stories are usually polarised for various reasons. In the past, whenever I've made guesses, I'm wrong half the time. My reasoning for one situation was that the harasser was known for making dirty jokes and was misinterpreted, but oh no, he turned out to be a creep.

It's always horrifying to make the wrong call on this, so it's just best avoided until evidence on either side solidifies. We also want to create an environment safe for victims to speak up, even if that means false positives every now and then.