(says the person who finds every excuse to deny genetic explanations)
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Replying to @HbdNrx @arnoldtohtfan and
I simply disagree with the strange jumps from "human variation exist" (which I agree with) to "migration is bad" or "IQ test score variation is the reason for class stratification."
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Replying to @Bananaaquamelon @arnoldtohtfan and
The really big picture is that genetic differences cause differences in intelligence among different groups of people, which results in different standards of living in different countries. IQ is strongly linked to the material wealth of nations.
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Replying to @HbdNrx @Bananaaquamelon and
Where is the genetic evidence? Heritability doesn't show causation. So that's out of the question.
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Replying to @Race__Realist @Bananaaquamelon and
There is genetic evidence and you know it. eg https://www.nature.com/articles/ng.3869 … As well as twin studies and adoption studies, which are in fact useful for determining how much genetic influence there is on a trait.
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Replying to @HbdNrx @Bananaaquamelon and
Twin studies and adoption studies are highly flawed. GWAS can't show causation.
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Replying to @Race__Realist @HbdNrx and
GWAS shows causation to the extent that it separates the inheritance factor from the environmental factor. GWAS doesn't say anything about genes, and the details of genetic processes are of no direct relevance to heritability.
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Replying to @HobbesianM @HbdNrx and
They show 'associations', not causaation.
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Replying to @Race__Realist @HbdNrx and
Yes. GWAS doesn't prove that any particular gene plays a causal role. Nor does that fact imply that any particular gene is *not* causal. Only detailed empirical research into how that gene is expressed can answer that question for each gene. GWAS gives pointers on where to look.
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Replying to @HobbesianM @HbdNrx and
I agree. But to assert that GWA studies on 'intelligence' purport to show genes that 'influence' 'IQ' scores is a bold claim.
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They're one of many pieces of evidence on favor of that
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