Often in discussions of (a)theism, an atheist or unbelieving skeptic will say, "We've learned tons of things from science. What have we learned from religion, revelation or prayer?"
I've heard several variants of this argument that are more or less categorically identical, and much like the first move of a pawn influences the outcome of a game of chess, the subsequent responses also tend to follow with a uniform predictability: The believer either answers unsatisfactorily or not at all, or if the believer does answer, the atheist or unbelieving skeptic will typically deny that what the believer offered was actually learned from religion, revelation or prayer.
This is where I've seen most discussions on the matter come to a screeching halt. This is unfortunate, as the believer need only to realize that what's going on is an rhetorical farce, then rebut the atheist or unbelieving skeptic with a few quick and sturdy replies.