Bill Whittle gives an Afterburner talk on how intellectuals come to be so profoundly committed to their theories that they're blind to contradictory evidence. Like love-struck adolescent girls infatuated with the class bad boy they simply don't see what everyone else sees.
The context of Whittle's talk is anthropogenic (man-caused) gobal warming (AGW) and Marxist economics, but he could just as easily have been talking about Darwinism. Give it a look: