Does God exist: A hopefully civil and fruitful debate

alright then, I'll use the classic omnipotence paradox. Can God create a rock so heavy that even he can not lift it?

If he can, he can't lift it, therefore he is not all powerful
If he can't, then he's not all powerful

sweet!! now that that's over, I'm going to drink some green tea to celebrate

I anticipated as much. I don't expect you to accept that that argument is bogus, but consider this:

- How much force do you have to exert to lift a rock of weight A (Newton)? F > A, evidently.
- How much force do you have to exert to lift a rock of infinite weight, which we take for granted to be produced by God? F > infinity, evidently.

When you can get back to me how to make sense of a quantity larger than infinity, I'll accept the argument as sensible.

The contradiction here does not lay with God's all-powerfulness, but with the idea in the argument itself. In so far as we still use reason to comprehend God, we cannot go beyond the bound of what actually makes sense to us. A quantity larger than infinity is nonsense.

and God is the exception to this ?

Yes. The term 'god' here is defined as whatever is excepted from the causal chain, a cause that is not itself an effect.