Show of Hands

You can't help those who don't want to help themselves.

Debating can help in the long term, but isn't very likely to instantly change someone's mind. Sometimes the purpose of debating someone is just to raise the "intellectual burden" he or she must carry in order to maintain his or her position.

A lot of times facts are not enough to persuade. But in the face of them ,they should at least acknowledge "something" of a compromise.