The absolute absurdity of God

[SteveII]

The best, most sound mathematical and physical models of the universe do not posit an etneral universe. https://en.wikipedia.org/wiki/Big_Bang

That applies to the Universe. I'm going beyond the Universe, in case I haven't made it obvious.
Beyond the Universe, out of the Universe.
Models exist that posit that spacetime could be in existence in the absence of the Universe and that this spacetime is responsible for somehow generating the Universe.

I would like to read up on such models that don't require and physics and are separate from the universe. Sounds more like metaphysical musings. Do you have a link?

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You are describing a metaphysical concept--not anything remotely connected to reality. My argument deals with what we know and what can be known. A possible defeater to any of the premises is not enough because the premises are measured on the "more likely than not" scale in order to be successful in an inductive argument. Nothing you propose remotely qualifies for "more likely than not". 

Don't you wonder about the biases that went into determining that likelihood?

 
Biases? You mean like science, observation, experience, intuition? These are the things that your "possibility" lacks.