It does (predicts that our universe began to exist)? AFAIKnew, it traces spacetime/matter+/+energy back to where classical physical models break down, and doesn't include ideas about events prior to the Planck epoch.
You are conflating the theories known extension of knowledge back to one single Planck second with a fundamental prediction of the theory.
I'm not sure what you mean by that- the BBT traces things back to where they can't be traced by current models, and sort of sweeps the eternity before spacetime expansion under the rug (it doesn't really "sweep it under the rug"- but it (the BBT) doesn't address where current models have singularities (or mathematical infinities)).
The BGV also adds to that prediction by asserting that any universe which is on average expanding can not be past eternal.
AFAICT it says that spacetime has a singularity point from which it began to expand. That doesn't mean that some other spacetime didn't exist from which this spacetime began to expand from. The seed for this spacetime quantum tunneled from another spacetime and started expansion... BB.
Tell me what would you expect the evidence to look like......If the entire universe actually began to exist at that Planck second?
Tell me what you would expect the evidence to look like.... If the entire universe actually began to exist last Tuesday, with all histories intact?
What if the universe is entirely different every Tuesday, changing past histories, but we ALWAYS remember the new histories that start on the new Tuesday?
I'm telling you. That's exactly what is happening. I have proof. Try to find any evidence that history does not extend beyond last Tuesday. You cannot- it is because all the history began to exist last Tuesday.
How would that evidence look any different from what we actually have right now?
It doesn't matter. It won't last past Tuesday, unless it's an illusion that it existed before next Tuesday.
AFAICT, the BGV theorem doesn't address cyclical systems in which energy/disorder decreases or increases due to various self adjustments between cycles of universal expansion- it just assumes that "universal cycle resets" always result in the subsequent universal cycle having greater entropy than the one before it.
Perhaps you can inform me as to why scientists "assume" the entropy increases.
Well, that's what they see everywhere. However, they don't really spend a lot of time probing singularities, so they don't know what happens when one is born (well, at least I'm not informed about theories that successfully describe singularities).
Provide some actual actual scientific evidence for your speculation and I'll give it a serious look.
How? It's all speculation until the FSM extends a noodley appendage.
Thus any model attempting to extend a material existence beyond the singularity is less plausible.
Why? The singularity (ok, smaller than Planck length) is where classical physical models break down. They (classical theories) break down when energy density is over a certain amount (think black holes). Doesn't mean there isn't some form natural law governing things.
Yes it does. Natural laws end at nature. No nature no natural laws.
Well, I had Vilenkin quoted as saying something along the lines of "before the BB there where still the laws of GR and QM", but I can't find it now. Mehh...
The main point I was making is that the KCA assumes a beginning to the universe, and there might not be one (unless you define the universe as everything except God and/or nature).
First, I consider the universe to be all of nature, meaning all of physical reality.
Secondly, p2 STATES that the "universe began to exist" and it is philosophically and scientifically SUPPORTED. Your disingenuous phraseology of "the KCA assumes a beginning to the universe " infers that no support has been provided. That is certainly not the case, as evidenced by the fact, that we have been debating this support for over a month.
Umm, there is no support for that. Spacetime expansion began, that doesn't mean this is the originating spacetime, it doesn't mean that there aren't other spacetimes that began to expand, etc.
Vilenkin, of the BGV theorem, speaks of the multiverse sometimes, and sometimes talks about quantum tunneling causing spacetime to begin to expand. Doesn't really mean that the universe began, it means our spacetime began to expand.
Keep in mind that a scientifically advanced culture living in an eternal universe could create a new universe. Not that we are getting there... but... you know, as long as we are speculating wildly...