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Originally posted by Not Me
A vestigial organ shows that the species once needed that for some purpose, but no longer needs it.
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See, that's the problem with your logic. You've got things turned around. You're using the theory to explain the evidence, not the evidence to explain the theory.
If you can demonstrate that a vestigial organ once had a purpose, then you can use it to contend that under evolution it was selected for. And then you can show that, if there is no longer a need for the organ, and it is disappearing/shrinking, that it is consistent with evolutionary theory. But the existence of a vestigial organ does not prove that it once was needed and, therefore, that evolution is right. That proof is independent of evolutionary theory, and, together with observations about the organ's continued existence, supports the theory of evolution.
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It does not necessarily undermine evolution.
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With that modification, we are in agreement.
What explains homosexuality?
