Re: [math-fun] Scientific Method, Experiments and Causality

----- Whenever you see some statistical correlation used to imply causation ... ----- Correlation alone should *never* be used to infer causation. It's not only difficult to infer causation, it's difficult to define. —Dan Brent Meeker wrote: ----- Of course the study that shows that listening to "When I"m Sixty Four" makes you younger is one that shouldn't require statistical correlation analysis at all. Whenever you see some statistical correlation used to imply causation the first thing you ask yourself is, "Could this have been tested directly?" There's no point trying to clean up statistical inference if none is needed in the first place. -----