Most recently, about Kamala Harris' viability as a candidate at this stage of the campaign.
I didn't think there would be time to rally any but the die hard, identity politics driven democrats firmly behind her. Boy howdy, I called that one wrong lol. She's got almost the entire party behind her, and sizable chunks of independent voters too.
Still don't know if it's enough to win, though it's looking probable.
Took some serious heat over that take lol.
As far as my end of things, I've been wrong so many times in my life, it's old hat. And I'm used to changing my thinking as my understanding of something grows. It's gotten to the point that if something isn't essentially so well proven as to be truth, I stay open to change, even if only in my head. The type of things that can reach that degree of certainty are almost exclusively in maths and physical sciences. Mind you, I don't necessarily reject the possibility of change even there, nor extend it to anywhere outside my head.