Your definition is a good one and I'm sure the official one. But I still think it is an indirect way of describing the phenomena. I'm going to consult a few dozen textbooks soon, when I get a chance, and see where I'm getting hung up on the semantics of this. Thanks for your input.
{ABE} A not too small point that I think is of importance on this issue is that "selection" has a substantive meaning which is meant in the term Natural Selection.
Selection, the noun, better explains the concept.
Edited by CosmicChimp, : new info today, ABE
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