I wrote this deductive proof for a friend a few days ago. I'm less concerned with debating the existence of God than I am in finding and plugging holes in the logic. I find deductive logic peculiarly beautiful.
Axiom: God is the being with the most power, knowledge, resources, presence and consistency across time and space.
Postulate 1: Technology is progressively improving in the long-run and neglecting entropy.
Postulate 2: Social morality is progressively improving in the long-run, despite frequent relapses.
Postulate 3: Technological progress inherently requires the development of artificial intelligence.
Postulate 4: The creation of artificial superintelligence is required by technological progress.
Postulate 5: Technological progress leads, across the multiverse, to the ability of a society to effectively manipulate time.
Postulate 6: There is a multiverse.
Postulate 7: The multiverse is capable of creating infinite variations of itself.
Postulate 8: A superintelligence would also develop the ability to manipulate time across the multiverse.
Postulate 9: Since the creation of the multiverse (by string theory) is via a time series of choices, the ability to manipulate time is the ability to shape the multiverse.
Theorem 1: There is, somewhere within the multiverse, a consciousness capable of manipulating time that is also superintelligent.
Theorem 2: There is a superintelligent, time-manipulating being capable of manipulating the multiverse.
This being we call God.