It's like pushing against air. If you say one thing, there's always the God cop out: "well, God made it that way". The debate is pointless. There is no evidence that can be presented that can possibly convince an ID person because all evidence was conjured by God in the first place.

I keep trying to come up with something more to say, and there just isn't anything else. There is absolutely no way you can disprove that the universe was created by an extra-universal being because he could conceivably manipulate any possible thing in our reality.

And if that's true, why bother studying science at all? It's liable to change at any second.