Could you have defended your honor, but didn't?

I was reading some answers to a question. There was some back and forth and then it stopped.

There are people who seem to be able to go on and on forever, always making some next point. Some people will never back down. Others will let go.

Have you had an experience (not just an academic exercise) where you got to a certain point and let it go? What was the disagreement about? Why were you willing to let it go?