"...while about 50 percent of the variation is due to the environment, this environmental effect does not come from the family." https://quillette.com/2018/08/09/a-striking-similarity-the-revolutionary-findings-of-twin-studies/ … via @QuilletteM
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Replying to @NineBandedBooks @QuilletteM
Very few people understand that 'environmental' effects include a large amount of pure random chance, not controllable or causally linked to anything else even in principle.
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Article gets this wrong. "...twin studies have not been able to identify conclusively the environmental factors that make up the remaining ‘nonshared’ variation." They never will, because so much of it comes down to coin-flips -- this neuron grew one way instead of another.
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Replying to @St_Rev @QuilletteM
But stochastic variables are acknowledged: "...also simply chance: random encounters or openings in the social hierarchy, cosmic rays that damage a piece of DNA, neurons that go zig instead of zag..."
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Maybe the editor wrote the conclusion, IDK
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. Banned in Sweden. SubGenius, Zhuangist, white-hat troll. Defrocked mathematician. Brain problems.