[ahayes]

To wit: … Species evolve regardless of selection pressure…

I'm pretty sure that it was you that I explained this too. Natural selection is not the only mechanism for evolution. Genetic drift also drives evolution. Due to genetic drift a species can evolve (the frequency of alleles in the population can change) and species can diverge. I'm afraid using this as an objection to the theory of evolution just makes you look like you don't really know what you're talking about.

[Fester Chugabrew]

Natural selection is not the only mechanism for evolution.

I hope not. Gravity must certainly have something to do with it. Also weather. And don't forget Capricorn.

[Lucky Dog]

…Natural selection is not the only mechanism for evolution. Genetic drift also drives evolution…

If we agree that “natural selection” as posited in the theory of evolution is the operation of “survival of the fittest” based upon survival advantages conferred by mutations, then we have no disagreement on this term. I suppose there could be some additional discussion about the variation in pressure from natural selection, but no disagreement as to its place in the theory of evolution.

However, for the second term, let me see if I understand what you are positing here: “Genetic drift” which is the appearance of purely random mutations operated upon by purely “arbitrary” selection mechanisms produces new species.

Are my statements essential correct?