P1) Natural selection lowers genetic variation in traits important for survival. P2) Intelligence is important for survival. C) Therefore intelligence should have a low to nonexistent variation in humans.
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Replying to @Race__Realist @insurrealist and
Except that there is enormous variation within humans. There are people with IQ's of 80 and people like Bill Gates or Mark Zuckerberg.
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Replying to @Biorealism @Race__Realist and
Heritability of IQ is in the order of. 5
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Replying to @Biorealism @Race__Realist and
So there is ample extant genetic variation within human populations.
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Replying to @Biorealism @insurrealist and
False. You're assuming that IQ tests test intelligence in lieu of construct validity. My argument establishes that IQ tests are tests of middle class knowledge.
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Replying to @Race__Realist @insurrealist and
Oh well we're going to have to agree to disagree on that.https://www.nature.com/articles/mp2014105 …
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Replying to @Biorealism @insurrealist and
Which premise does this link address?
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Replying to @Race__Realist @insurrealist and
If you are concerned about whether tests simply measure middle class status go back to Jensen's Bias in Mental Testing.
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Replying to @Biorealism @insurrealist and
I've read it. It doesn't address my argument. IQ tests gave general knowledge questions on them, mostly found in the middle class. Read:https://www.scribd.com/document/250660667/Richardson-2002-What-Iq-Tests-Test …
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Replying to @Race__Realist @insurrealist and
Hold on, are you the blogger that Emil Kirkegaard dedicated a post to? He addresses Richardson there. http://emilkirkegaard.dk/en/?p=6994
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Great find. Check the Twitter handle.
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