Swinburne notes that “a cosmological argument argues that the fact that there is a universe needs explaining” (2004: 9–10). However, he emphasizes that his approach differs from those we have already considered in that he rejects the Principle of Sufficient Reason understood as “everything not ‘metaphysically necessary’ has an explanation in something ‘metaphysically necessary’” (2004: 148), for the PSR leads, as it does in Leibniz, to a being that is logically necessary, and such a being cannot