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I'm willing to concede evolution for the sake of the discussion, btw. But one thing this discussion completely overlooks is that the way we make babies today in almost 99.99999% of the cases is by having sex -- not through some process akin to researching and then writing and defending a doctoral thesis on the desirable genetic markers in a set of single-source female gametes. I mean: my kids were not the product of some fully-reasoned process by which my wife and I thought about all the likely needs they would have and thereby first provided for all of them, then instituted scientific trial to create their perfect encoded sequence.
My children are a product of love -- and I hope yours are, too. And here's the crazy thing about love: I loved them before I knew them.
Discuss.