While the theoretical possibility of "this universe" being caused by some dude in a labcoat technically exists, the fact remains that such a scientist could not be the *first* cause; he could only fulfil an earlier place in the chain of causes. This is because anything with a body is composed of parts (unless it is prime matter, which is something even less than an atom according to quantum mechanics), and anything composed of parts is *contingent* on those parts - depends on those parts for its being. Furthermore, an embodied thing is *limited* by the bounds of its body, and thus cannot be the highest of all natures or the greatest of all perfections, since there is a theoretical "potency" or potential still within such a being. For not only must whatever God is be entirely necessary, but what follows from this is that God must be Pure Act - pure actuality. There can be no unactualized potential in God, there can be nothing that is not already fulfilled in Him. A man with a body is limited, is finite; God must be infinite. So even if some dude in a labcoat did create this universe, the God I believe in still would have had to create *him*. And based on the principle of economy, it is less reasonable to suppose that God created some dude in a labcoat to create this universe, than to suppose that God created this universe.