Ok, disregarding the price of $45 what do ya'll think about this:
<img src="http://www.cyberresearch.com/images/products/1052094752.300.jpg" border="0">
http://www.cyberresearch.com/store/product/862.2.htm
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"Empirically observed covariation is a necessary but not sufficient condition for causality" - Edward Tufte
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