A couple of years ago, before the AI boom, a guy on Reddit was absolutely convinced (to the point that he started Reddit stalking me over it) that I was a rogue AI. At one point, I even took a photo of myself (censoring my face obviously) holding up a napkin with his username written on it in sharpie. He said it was photoshopped.
My point is that once you make this sort of accusation about someone, the conversation is basically over. They’ll never convince you that you’re wrong and there’s no point in talking to them if you’re right.