You: The fact is that there are some thing that cannot not be. According to the law of conservation of energy, things may change form — say from matter to energy — but they cannot be destroyed completely.

Aaron: I cannot believe that physicists would ever say any such thing. We use energy all the time. I plug a lamp into an electrical socket and use the electricity.

You: All you are doing is turning electricity into light and heat. Nothing is destroyed.

Aaron: Well, I was not aware of this "fact." Even if it is true, which I tend to doubt, it does not prove that there is not God.

You: I was not trying to prove that God doesn't exist, you were trying to prove that he does.

Aaron: Well, you can't fault me for not being an expert in physics. Let me try a stronger argument along the same lines.