It seems that an expansion rate must apply to universes that have a chance of giving rise to life, but not all universes in a multiverse model need to give rise to life. It only has to be one that emerges out of an infinite amount in the course of infinity. There might've been/might still be trillions and trillions of parallel universes that emerged with slightly different physical laws and weren't suitable for life, and ours which was able to give rise to life. Another thing to consider is that our universe may not be the only type of universe suitable for life. Perhaps through a different process, methane-based life was able to form somewhere else, or maybe in a universe that contained more anti-matter than matter, anti-matter based life was able to form. Perhaps in a wacky universe where matter can't even exist, purely energy and radiation based life was able to somehow come about.It most certainly does apply to ANY type of multi-verse too. ANY universe with ANY laws of physics that has ANY chance of being anthropic (for ANY type of life) MUST be an expanding universe with ANY fractional expansion rate that is greater than zero. That is precisely what the BVG theorem postulates and no one has been able to put any holes in that theorem yet. It is unlikely that they ever will because the alternative is spontaneous, instantaneous creation of eternal life. Try to wrap your head around that one.
Robert Spitzer to me appears to be arguing for a fine tuned universe that cannot deviate in only one part of a million out of millions of factors, which is definately true but doesn't address whether it's fine tuned because it's designed by God or because it was the universe that got it right after an infinite amount of time of randomly generated universes.
Sure, I don't think there's any evidence of it and I don't think one ought to accept it as true. But considering the theory on it's own without saying if it's supported by science or not, I think it does make philosophical sense and have a remote possibility of being true, and if it is true I think it would be able to explain our highly fine tuned universe without the need of a supernatural creator designing and creating it. Because of this, even if God is in fact the first cause and creator of the universe, it doesn't seem to me that God is necessarily the first cause and creator, even though I believe that He is. So because of this I don't really think that saying that the first cause principle proves our God's existence really works. There are other possible explanations.Do we have evidence for these other proposed universes? What makes us think physical law wouldn't be the same? Where did the other universes come from? If the chances of nothing creating something are 0 and we have X number of other universes, doesn't this make the whole scenario even more impossible?
That's a bit of an area of concern for me right now. Right now I kind of feel like I don't have much of a leg to stand on because I feel that various arguements for the existence of God seem to break down when you really dig deep enough and approach it honestly, and many of the arguements in favor of the Bible only work if you already accept the Bible as true.Interesting Seraph, without using some sort of cosmological argument, how do you present a good case for God's existence both for your own faith and to help convince nonbelievers? Do you adhere to other popular arguments such as the fine tuning, design, ontological, and moral arguments? Or do you go a completely different route? Just curious.
This post is starting to look kind of dark so I should probably point out that I don't arrive at these conclusions because I have an agenda to become an Atheist or disprove Christianity but quite the opposite. I'm trying to be as intellectually honest as possible, even if it means being skeptical towards arguements in favor of what I already believe in. If I find arguements for God that stand up against criticism, then I would better be able to answer the questions about the existence of God that I commonly come across, like the ones posed in the opening post.