It's been a while since I had a random encounter with someone who obviously assumed we were archenemies or something. 
Doing mathface to figure out when I was even talking about mansplaining and communism.
I just... mostly out of slightly amused bemusement... searched my tweets between October 27th and October 30th to see if I made some aside comment somewhere that could have been referenced by the message. Nope. Whatever she's talking about is more than three days old.
This used to happen to me all the time on Tumblr, when some post of mine would still be circulating virally months or years after I made it, and I'd get a message in my inbox going "BUT THE THING YOU FAILED TO CONSIDER IS ______" with no preamble or subject reference at all.
