Reproductive isolation is also not all or nothing. It is often known to have occured when a population split in two, whether split by geography or two non-overlapping mating strategies. It's often only after that when you see genetic barriers develop and some species can successfully mate with each other but do not…

Evolution is scientific fact. Changes in biological populations have been observed and documented over both ecological and geological timeframes, despite false claims to the contrary. Natural selection is a theory to account for these changes, and a well supported one at that.

Ah, the 90's, when a post-modernist kook was the face of irrationalism and finding a biologist who was a registered Republican was easier than finding a soft bodied fossil.

@doppleganger