> It may not even be definable
Yes and no. We know with a fair level of certainly that it has dense and had extremely low entropy. During the first few moments after the bang, should we not be able to determine if the heat was building (which would indicate a cold initial condition) or...
The big bang is defined as the theory that the universe has expanded from a primordial hot and dense initial condition. Was it hot? I would suspect that the initial condition was in fact cold due to the lack of space and therefore movement. The heat happen directly after the bang. Does this seem...