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 @CovfefeAnon and
I'm bringing up brain volume as a counter to the argument that differences are just cultural. We know that's not the case.
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Replying to @TeaGeeGeePea @CovfefeAnon and
We know there are physiological difference between ancestry groups, that's not contentious. It doesn't mean anything unless you can connect it to the issues that *are* in dispute.
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Replying to @RCownie @TeaGeeGeePea and
Right, there are physiological differences and the brain is a physical organ and there are known physiological differences in group average brains. Physiological differences in legs, arms and organs are caused by selection for different traits - obviously the same for brains.
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Replying to @CovfefeAnon @TeaGeeGeePea and
If you select for a big body you get a big brain along with it. So you need a better argument than saying "obviously", or mumbling that you don't really mean "brain volume", you mean brain volume relative to ... what exactly ? I can't even tell from the discussion so far.
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Replying to @RCownie @TeaGeeGeePea and
Brain size differs by groups like other physical traits and it's not a 1:1 correlate with body size across groups. Your assertion for why groups have different mental traits is "culture" - you have no explanation for how culture causes differential brain volume.
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Replying to @CovfefeAnon @TeaGeeGeePea and
You're bringing in something new with "mental traits" and I don't know what you mean by that. There are things we measure - brain volume, somewhat reliably; "IQ" - not very reliably and with culture/knowledge biases; reaction time.
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Replying to @RCownie @CovfefeAnon and
If you tell me what you mean by "mental traits", then I can say whether I believe they might a real thing related to ancestry-group genetics. If you're trying to skate around the question of the unreliability/bias of "IQ", not so much.
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Wait - you've shifted to "IQ is unreliable" now? Want to make bets on that? Next year, death by accidents for bottom IQ quintile will be higher than for top IQ quintile. It's been so in the past but IQ is unreliable, right? Sucker bet - surely random accidents are random, right?
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Replying to @RCownie @CovfefeAnon and
But I'll happily make a bet that if you take the same test this week and next week, you'll get two different scores.
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