Yes, I frequently apologize even if I don't feel I'm at fault. I'd prefer to move on from trivial issues than argue semantics.

I only argue my point when there is something to be "gained." To me, "gaining" would be something physical, like money owed, or something emotional, like respect from someone important to me.

ETA: I generally feel fine after, as I've stopped wasting my time and can devote attention to more important matters.
- Seek first to understand, then to be understood.
- Character is how you treat those who can do nothing for you.