Why then would nature select new organisms that had to mate, one male, and one female in order to do that which is much more difficult to achieve, as far as survival is concerned, if nature, in fact, selects the most optimal organism?
The problem is that no one except Biblical Creationists suggests that nature selects the most optimal organism or method. In fact all of the evidence is that that is NOT what happens or has happened.
What pases the filter is not what is optimal, or even PDG, but what works.
Aslan is not a
Tame Lion
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