John W. Loftus writes:
Christian philosopher W. Christopher Stewart objects to the “god of the gaps” epistemology because, as he says, “natural laws are not independent of God. For the Christian theist, God upholds nature in existence, sustaining it in a providential way.” From his perspective this is true. But his rationale is a bit strange. He says, “To do so is to make religious belief an easy target as the gaps in scientific understanding narrow with each scientific discovery,” in “Religion and Science,” Reason for the Hope Within, ed. Michael Murray (Wm. B. Eerdmans Pub., Co., 1999), p. 321-322. Now why should he be concerned with this unless science truly is leaving less and less room for the supernatural? He’s admitting the evidence does not favor his faith. He’s trying to explain away the evidence. If he still lived in a pre-scientific era before science could explain so much he’d be arguing this is evidence that God exists!
Do gaps in scientific understanding narrow with every discovery? Or do scientific discoveries sometimes render gaps larger and at least apparently less bridgeable? My two favorite examples are the way in which science undermined confidence in determinism through quantum mechanics and undermined confidence in a beginningless universe through Big Bang cosmology. These developments, it seems to me, opened gaps rather than closed them. Naturalism has found ways of living without determinism and a beginningless universe, but before these scientific developments took place naturalists thought that they were essential to their naturalistic world-view.
There may well be something right about the anti-God-of-the-gaps rhetoric. But it's a mistake to give in to it every time it is brought up. Often these arguments are given a free pass, even by Christians.
Of course Stewart may think that there are reasons for accepting theism that do not involve gaps. The Thomistic cosmological and ontological arguments don't appeal to gaps at all, so far as I can tell.