What is anyone's guess? The brain isn't a trait. It's something that evolved due to natural selection? Do you accept natural selection?
By-products of what? You accept that the brain evolved & that this is by natural selection so you accept that some of it is adaptive.
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by-products of any co-extensive trait - it doesn't follow from the fact that i accept the brain evolved that i accept some of it is adaptive
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It does if you accept that evolution works by what makes us survive & procreate & that many of those things are cognitive & psychological.
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Our ability to recognise the opposite sex. Our instinct to nurture our children. Our instinct to run from danger
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our ability to recognize the opposite sex is evidence that the mind is adapted?
End of conversation
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