I meant humans did, rather than you personally :-). If we (generally) put animals into different categories, purely because they "can't" breed with each other. How does that disprove evolution? Which is the point theland is making.
Not being able to breed an elephant with a giraffe, doesn't disprove we can't make new species, who go on to breed and become more and more different from the original, until we reclassify them.
I'm still interested in theland's views on human evolution as well.