We have a chapter in the book called “How to Persuade People Who Don’t Want to Be Persuaded,” which is really, really hard. So we listed a series of rules of what you could try to do, and then some of the surefire things not to do. One of the surefire things not to do is insult people. A lot of smart people seem to forget this. Once you start personally insulting your opponent, there is no way he is going to come around to your side.
