That's a good lesson to internalize, but how do you get someone to internalize it? How do you explain it (in five minutes or less) in such a way that someone can actually use it?

I'm not saying that there's no easy way to explain it; I just don't know what that way would be. When I argue with someone who acts like their intuitions are magic, I usually go back to basic epistemology: define concisely what it means to be right about whatever we're discussing, and show that their intuitions here aren't magic. If there's a simple way to explain in general that intuition isn't magic, I'd really love to hear it. Any ideas?