I'm currently studying a wonderful case of "No! I'm right! Lalala I can't hear you!". It seems to be completely about status. She used to have huge self-esteem issues, and she uses what she calls "confidence" as a protective shell. Changing her mind about something (not admitting to it, just stopping defending it) would destroy it, so she just doesn't. And believes a lot of weird crap as a result, even in her own domain.

Rephrasing the correction as a question? Works.

That's annoying. What do you do if you're genuinely unsure if they're making a specific mistake and want to know? That's like the one where any expression of preference is a demand, so you can't express weak preferences. I hate people.