Correlation, Causation and Internet Comments

Daniel Engber wrote a wonderful piece at Slate. Engber examines when you can hide behind the phrase correlation does not imply causation and when that may not be the best idea. "The correlation phrase has become so common and so irritating that a minor backlash has now ensued against the rhetoric if not the concept. No, correlation does not imply causation, but it sure as hell provides a hint." (thanks Rachel Scollon)