"It is because of such things that I suggested we examine the question of what we really mean by a species, as that should not be a world-against-pete discussion. It is hard to justify an "Origin of Species" unless one is clear what constitutes a species. And, as I hinted, I suspect we are less certain of this than we imagine."

You may, possibly, be right. But so what? Science is equipped to handle such uncertainties - if a convincing case can be made that it is necessary to do so. On the other hand, religious fundamentalists, like pete, insist that all truths are contained within the pages of ancient texts and it is sacrilege to question, contradict or reject those truths in the light of new evidence.