I was brought up short by the statement about how we all "know the difference between causation and correlation, so let's move on", i.e. pretend that we all know about this: what an elitist delusion! Granted that it is a subtle concept, but we are entertained every day with so many examples: flag pins, cholesterol, gun control, you name it...Let's try to damp down the confusion, not spread it...disigny