[Taking the contrapositive is a valid form of reasoning in which you flip an implication upside-down and backward.] http://en.wikipedia.org/wiki/Contraposition …
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Sound Epistemology Cat reconsiders the implications of her data normality assumption.pic.twitter.com/v6ilEEz9Ol
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@wanderingtree Glad you liked!
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@Meaningness This was equally funny when I first misread it as 'take the contraceptive'.Thanks. Twitter will use this to make your timeline better. UndoUndo
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