You: Experience teaches me to tell natural and created objects apart. If I came upon something natural that looked like a manmade object, say a rock that looked like an arrowhead, I might ask myself whether it might have come to have that shape through natural processes. I must rely on my experience of other objects. For instance, one doesn't find tooled leather belts or wallets growing from trees, so it is safe to assume that they are not natural objects.

Aaron: But, consider this: if I were to cut a slab of rock from the side of a mountain and carve it into the shape of a boulder. Because you have never encountered a man-made boulder before, you would be tricked into thinking it was a natural object. For this reason, you cannot rely on your experiences.

You: Assuming that you left no tell-tale chisel marks on your boulder and I did conclude, incorrectly, that it had been formed naturally, that would mean nothing. All you would have proven is that man can imitate nature.

The point is, experience tells me that things are either man made or that they come into existence through natural processes. You can demonstrate that an object I thought was natural was manufactured by a person, or that an object I thought was manufactured is natural, but that doesn't help your argument a bit. Only by demonstrating that an object fits into neither class could you begin to convince me that it was created by God.