xkcd on the correlation between correlation and causation
Tim Finin, 8:20am 6 March 2009
The common observation that correlation does not imply causation is a cold and cruel idea that knows no mercy.
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March 8th, 2009 at 7:50 am
Wired says that the correlation/causation distinction is quaint and obsolete.
March 8th, 2009 at 8:51 am
The mouseover text on the xkcd image is great too: “but it does waggle its eyebrows suggestively and gesture furtively while mouthing ‘look over there’ “
March 9th, 2009 at 12:37 pm
haha, I like it.
March 11th, 2009 at 11:08 pm
Based on a large sample of studies, I measured the correlation between correlation and causation to be 0.977 – strong enough to believe that, for all practical purposes, correlation causes causation.
http://ghill.customer.netspace.net.au/correlation-causation.html