Spotted in MemoRanda:

Why smart people defend bad ideas" quotes: ... one thing I did learn after years of studying advanced logic theory is that proficiency in argument can easily be used to overpower others, even when you are dead wrong. ... The problem with smart people is that they like to be right and sometimes will defend ideas to the death rather than admit they're wrong. ... if they got away with it when they were young ... they've probably built an ego around being right ... Until they come face to face with someone who is tenacious enough to dissect their logic, and resilient enough to endure the thinly veiled intellectual abuse they dish out during debate ... they're never forced to question their ability to defend bad ideas.