But that’s not the question, at least not as I see it – if god can change the laws of the universe, he is not fundamentally subject to them, right? So, that the boulder is not movable according to the laws of the universe (even by god) has no bearing on god’s actual capabilities, since he supersedes these laws. But then, there’s no meaning to saying that he can’t lift the boulder, since, by exercising one of his faculties – changing the laws of the universe – he can. Then, the boulder never was a boulder that can’t be lifted by god – it was merely a boulder that can’t be lifted by god without god changing the laws of the universe; i.e. his inability to lift the boulder is contingent on not using all of his powers.
Similarly, flexing my biceps is one of my faculties, and it might well be that I am unable to lift a boulder without exercising it; but that doesn’t mean that I can’t lift that boulder, since I might well be able to when I do flex my biceps.