Jonah Lehrer, on his New Yorker blog:
The problem with this introspective approach is that the driving forces behind biases - the root causes of our irrationality - are largely unconscious, which means they remain invisible to self-analysis and impermeable to intelligence. In fact, introspection can actually compound the error, blinding us to those primal processes responsible for many of our everyday failings. We spin eloquent stories, but these stories miss the point. The more we attempt to know ourselves, the less we actually understand.
It hurt to write that title but I'm trying to prove a point. Bias much?