Kuhn's key insight about human psychology is that we usually yearn for internal coherence far more strongly than we yearn for external correspondence with reality. Sure, when I come across a new and complicated fact I like to tell myself that I'll allow the fact to triumph over my theory. But, truth be told, I'm more likely to doubt the pesky fact, or at least find a way to explain it away, than to doubt my theory. We're all like the scientists who are looking not to upend their theories but to confirm them. We are more interested in coherence - or internal consistency in our worldview - than to correspondence with the facts we encounter in the world beyond our heads.
