Reply to comment

I'm not very familiar with Kuhn's theory, but if revolutionary science occurs when one paradigm replaces another, is it possible, within this science to have a confrontation of scientific theories, and if not how would one account for their occurance in science? For example in the field of human evolution, there is much dispute over the classification of species and how they relate to each other. These theories oppose each other, co-existing because they can neither be proved or disproved.