How was predicting a lack of WMD correct by mere coincidence? He ignored the blatant liars, believed people with a good record on the subject, and got it right as a result. That's not coincidence, that's an excellent heuristic.

It is a bit of a weird article, though. Correctly predicting Iraq isn't some amazing feat. All it required was being paying some vague attention to the available facts. The question is not, how did some people get it right. The question is, how did so many people not?