Slate has a good editorial on Sunday's "Meet the Press" interview with GW. The premise of the editorial is that Bush has theories about how the world works, and only sees the evidence that supports those ideas. He doesn't change his mind, no matter how tenuous his arguments become. It's a Platonic view of reality where the ideas of things are more important than how they really are. Here's a quote:
You can hear the gears turning in Bush's mind. We were attacked on Sept. 11, 2001. That attack exposed a new reality. That new reality changed the context for interpreting intelligence. Or, as Howard Dean less charitably puts it, if Bush and his administration "have a theory and a fact, and [the two] don't coincide, they get rid of the fact instead of the theory."