I would think so, at least for knowledge-based ones. Thinking about this out loud, it's hard to feel I can claim certainty given anything seems to have the potential to remind me of the adage that one can never be certain of anything. However, there are a handful where this doubt is completely obsolete, typically because I'm talking to someone who doesn't seem to know the answer is an obvious part of life for me. I have been wrong before and will mention so within reason (as in based on a battle of experience/testimony/proofs/contradictoriness in its equivalent to PEMDAS).

Plenty of times. But that's not the same as the other party accepting the fact :o) I've also been proven wrong many times. The way the question is posed implies that this is a rare occurance?

As a Maths teacher, almost daily 😂

Every time. Especially anonymously on the Internet.

Of course, the other person may remain rooted in their ignorance and fallacy, but that's their loss.