Originally Posted by
Tvtyrant
Yeah there are some holes in our understanding of physics that make this basically a fruitless line of inquiry. The Big Bang is essentially an attempt to save the Axiom of Universality and with it the Laws of Thermodynamics. "Ok, so all the evidence suggests the laws of physics must have changed. We will keep the Axiom and push back the change point to the furthest possible time."
The game at this point is "How far back can we plausibly assume the current rules apply" and move on.