Well I think it's rather arrogant of any scientist to claim that a phenomenon that self-evidently occurs is a mere "scientific concept". Evolution is no more a scientific concept than the moon is a scientific concept. The scientific concepts surrounding the fact of evolution derive from the scientific explanations of evolution, no more, no less, not the phenomenon itself, which certainly occurs (and which is therefore true, just as the moon is true). The confusion, Snail, is all in your head. As you seem to want to parade your scientific credentials in front of us, I'm beginning to suspect that, rather then wanting to communicate the truth and beauty of nature, along with their elegant scientific explanations, you'd rather keep them arcane, for the consumption of a scientific elite only. No wonder we still have people like pete who have given up on science. Because of people like you, they think it's too bloody hard.