So Occam's Razor points to culture alone. But I grant that brain adaptation *could* have happened. I just don't see clear evidence of brain differences between populations.
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Replying to @RCownie @TeaGeeGeePea and
> I just don't see clear evidence of brain differences between populations. So differences in brain volume and neuron count just don't count? Or are those caused by "culture"?
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Replying to @CovfefeAnon @TeaGeeGeePea and
Cross off "skull caliper" again on second bingo card.
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Replying to @RCownie @CovfefeAnon and
Rather than linking to the essay on "bingo" again, I'm going to ask: what is your problem with measurement? Are you pro-ignorance?
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Replying to @TeaGeeGeePea @CovfefeAnon and
You're trying to make a triple bank-shot of invalid (or at best very weak) inferences: 1. No-one cares about brain volume in itself 2. You're claiming brain volume is correlated with IQ
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Replying to @RCownie @TeaGeeGeePea and
[but correlation on individuals within a group doesn't imply anything about inter-group differences, which may have different causes] 3. And claiming group differences in selection for IQ in the past.
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Replying to @RCownie @TeaGeeGeePea and
[but strongest selection in the past was on diseases, and correlates of IQ such as reaction time and perhaps decision-making skill seem generally useful, not with different usefulness to different groups.]
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Replying to @RCownie @TeaGeeGeePea and
Bigger muscles, on the whole, make you stronger in group X, but who knows if they do in group Y? Pitiful.
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Replying to @gcochran99 @RCownie and
If his argument was true then groups are even more dissimilar making it even more improbable that all the differences exactly even out to make all groups the same mentally
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Replying to @CovfefeAnon @gcochran99 and
Not if the environment is fundamentally the same, which is his (false) assertion. Everyone has parallel evolution to same level of mental ability because intelligence is equally useful for everyone. Insane, but taking that as a primitive it might work out that way.
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His assertions are self-contradictory - environments being different is his explanation for test scores (caused by culture) - environments having the same selective pressure for intelligence is his explanation for why groups are the *same*
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Replying to @CovfefeAnon @arnolfson and
Once you've got the cognitive and language capability for *cultural* adaptation, the selective pressure for genetic adaptation on cognition becomes much much weaker. Each individual doesn't have to figure out for themselves which berries are poisonous, they can *learn* it.
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Replying to @RCownie @CovfefeAnon and
But obviously that *cultural* adaptation produces different cultures in response to different regional environments. (Mostly) *instead* of having to evolve different brains.
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