Understanding people -- do you?

I don’t understand people. I don’t understand how they don’t understand how their actions affect other people’s actions.

Did you ever know a person who lied so much that they started to believe their own lies? I’ve known a couple of people like this. And they have to surround themselves with people who back up their “stories”. It’s never their fault, of course. It’s everyone else’s. They’re never wrong.

Course, come to think of it, House thinks he’s never wrong, so . . .

Who does House believe in? If not everyone is lying, how does House know the difference between who is lying and who isn’t?