Peter Boghossian's techniques of friendly persuasion are not mine, and maybe I'd be more effective if they… — Peter Boghossian

Here's a heresy: "How do you know that?" is a powerful question for helping people think, but it's not the best question. The best question is, "How could that belief be wrong?"

When your conversation partner is getting angry, the single best thing you can do in most circumstances is to stop whatever else you're doing and listen. It's very difficult to remain angry with someone who is patiently and earnestly listening, and if you break the cycle of frustrating dialogue early by switching to listening and learning, you can halt a great deal of your partner's mounting anger before it starts.

Know when to walk away, even when the conversation is going well. Putting pressure on your partner to continue a discussion beyond their comfort level shuts down listening, encourages defensiveness, and turns the conversation into a frustrated rehearsal of why one of you is correct and the other dense.