But evolution isn't philosophy. There is much evidence that human foreskins grew longer and more complex than that of the other apes and there must have been some benefit to this even if there isn't one now (there might be).
Scoliosis is not directly heritable. If it were, it would have been naturally selected out because many people (my cousin) would have died before adulthood without the surgery that's available now. Its a deformity, not a naturally selected trait.
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If it kills people before reproducing, it will be selected for. Even if it isn't deadly scoliosis, lower back pain is endemic and makes people a lot less efficient in everyday life.
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Selected out, you mean? Yes, but it's not hereditary. If it were and it killed people before reproducing or made them unable to have sex or raise children, it would have been naturally selected out. The genes would not have been able to pass on.
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Then we agree: without a natural-selection level difference the gene expression makes, not much happens! That means that the foreskin isn't exactly a great contender for NS-mediated evolution, right?
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I don't know what you mean? Obviously the foreskin evolved by natural selection. How else would it have come to be?
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The foreskin came to be because it did. To claim every part of us is specifically optimized by evolution isn't correct. Some things just are good-enough and are there because they didn't get overly in the way.
End of conversation
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