You: Supernatural things are things beyond nature, that is, things that cannot be explained in natural terms. By this definition, God is a supernatural thing. If things that cannot be explained by scientists are created by God and God, as a supernatural being, cannot be explained, then God created God. This makes no more sense than "I created myself" makes.

Aaron: On the contrary, it makes perfect sense! God is a necessarily existing being and therefore the reason for his own existence.

You: I assume that you are prepared to prove that to me.

Aaron: Of course!