D1. God is that than which no greater can be conceived.
P1. Either it is the case that God is the creator of the universe or it is not the case that God is the creator of the universe.
C1. Given D1 and P1, because the God that created the universe is greater than the God that did not create the universe, God created the universe.
P2. Given C1, either it is the case that the God that created the universe exists or it is not the case that the God that created the universe exists.
C2. Given D1 and P2, because the God that created the universe and does not exist is greater than the God that created the universe and does exist, God does not exist.
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