Sophisticated Christian: My God exists and He is omnipotent, kind, and loving. He chooses to allow evil because X, Y, and Z.
Atheist: If your god exists (he doesn't) and if he is omnipotent, kind, and loving (he isn't) then he MUST create a perfect world where there is no evil. I reject your arguments X, Y, and Z for the following reasons. (Blah, blah, blah.) Because MY version of YOUR imaginary god requires that he create a world where there is no evil, and because there is evil in the world, god doesn't exist.