And here goes the pattern. A lot of people simply assuming she's truthful just because she made the accusation, and a lot of people simply assuming she's lying just because he stated a defense.

I personally think the threat of libel (followed by the claim he won't because he's a good person or whatever) is a creepy move if he accepts there's the possibility she might have misinterpreted something. If she legitimately believes she was wronged, then that comes across as an intimidating silencing technique.