Wow, Margaret, great post! It has my vote for post of the year.
My only response is that I don't know that anyone defends:
Quote:
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Originally Posted by Margaret McGhee
that Ashkinazim Jews can increase their IQ substantially in just a few generations
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It might involve the group having evolved a high IQ over millennia, before there were accounts to reconcile. Then this group was chosen to perform this role for obvious reasons and the higher ones were culled from the group; it's this culling that may have turned an average (or somewhat above-average) population into a group of expected outliers.
Just looking for possible mechanisms...