"But" vs. "Yes, But"
This is another heuristic from the same place as If It’s Worth Your Time To Lie, It’s Worth My Time To Correct You. If someone proves you are absolutely, 100% wrong about something, it’s polite to say “Oh, I guess I was wrong, sorry” before launching into your next argument. That is, instead of: https://readscottalexander.com/posts/acx-but-vs-yes-but