Granted the boy really has all the makings of an atheist despite the self realization of it. He still has those few drawbacks that are hard to overcome at 13. Saying over and over again that he is an atheist wont make him say he is. Stimbo and whoever else that have been asking him questions are doing a better job at getting him past his drawbacks by making him answer these questions and pointing out the answer is always the same and isn't really thought out.
I'm no one special and I treat everyone the best I possibly can, but to you believer, despite my acts, I am condemned to hell.