I’ve had it happen before but I can’t think of any specific examples.

My reaction to it however has evolved over time. When I was younger I’d be way more embarrassed over it and just stop debating, accepting defeat at the next opportunity, only to shrink away in shame.

Nowadays though, I’ll still be embarrassed, but immediately admit fault, laugh at my stupidity and issue any necessary retraction. People are usually disarmed when you can admit you were wrong and they were right. Even more if you throw a little joke about being dumb or something in there.