You: Could your faith, in theory, be disproved?

Aaron: My faith cannot be disproved because it is true.

You: Let me phrase my question another way. We have been discussing arguments for the existence of God. As you have not been able to prove to me that there is a God, have you lost confidence in your proofs and, therefore, in your beliefs?

Aaron: No. My beliefs were not based on those proofs.

You: If I could prove to you that there was no God, would you change your mind?

Aaron: You could never prove that there is no God because there is a God.

You: Then we have been wasting our time. I will not believe in God without proof and you consider proof to be irrelevant.