The “marry your cousin” meme reduces IQ to 72, almost 2 st devs down, casting believers into mental weakness from which escape is hard.
Replying to @JamesPsychol
.@JamesPsychol fareed & afzal might have the data since they've got genealogical data going back 5 gens (at least for some of the subjects).
7:43 PM - 26 Oct 2014
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