1. | Each thing in the physical universe is contingent. | |
2. | If each thing in the physical universe is contingent, then the whole physical Universe (itself) is contingent. | |
3. | The whole Universe is contingent. (1, 2 MP) | |
4. | Everything requires a reason for its existence. (Principle of sufficient reason) | |
5. | A reason for the existence of any contingent being is external to the thing. | |
6. | The physical Universe requires a reason of its existence external to itself. (3, 4, 5) | |
7. | There is something external to the physical Universe which is the reason for its existence. (6) | |
8. | If there is something external to the physical Universe which is the reason for its existence, it is God. | |
9. | God exists. (8, 7) |