Or, alternatively, they're giving you a polite "out" and enabling mutual forgetting. I've been on the wrong side of this dynamic too many times and I think that

Or, alternatively, they're giving you a polite "out" and enabling mutual forgetting. I've been on the wrong side of this dynamic too many times and I think that when the other person claims not to remember, most of the time they're telling the truth - of course they didn't ruminate on that-thing-you-did as much as you did - but sometimes, I think it's intentional amnesia to avoid the social overhead of addressing the event head-on.