No one's saying you can make a branch of the tree of life into another branch. But you *can* make a branch split. Eventually you have two different breeds of mosquitoes that can't interbreed. That's a new species. But no, you can't turn a housefly into a potato through the breeding process, and evolution never claimed such a thing was possible. You're reinforcing my point that you only "disbelieve" it because you fail to understand it. *You have no opinion on the theory of evolution*. Only an opinion on some creationist strawman version, not the actual theory.