devans99 wrote:I imagine spacetime surrounded by just 'nothing'. 'Nothing' has no existence so is not infinite.
This comes across as contradictory to me. In the first sentence you imply "nothing exists" (as it is specifically that, which "surrounds" something). And in the second sentence you say "nothing does not exist".
If "nothing does not exist", then how can it "surround" something? Either 'nothing' exists, or it doesn't exist, ...can't have it both ways.
devans99 wrote:I am firmly of the opinion that spacetime is finite. When space expands, it pushes back the boundaries of 'nothing'.
Again, if "nothing does not exist" then it can't border, bound, separate, or surround something.
devans99 wrote:I don't think space needs a larger container to expand into.
Remember, you are talking about a FINITE space here, which definitionally implies finite borders. If these finite borders exist nowhere, then they don't exist, and if they don't exist then neither do the contents within these finite borders.
devans99 wrote:I think the BB started as a finite region of space.
If so, then this implies:
1. The BB did not create space. There was 'space' before the BB. There was a 'place' for the BB to start and happen.
2. The BB did not create time. There was 'time' before the BB. There was a 'time' for the BB to start and happen.
devans99 wrote:So the BB did not create space?
The alternative, the Big Bang starting as an infinite, expanding region, is a logical minefield.
It is logically impossible [X<X] for the BB to create spacetime (and matter). Both time and space (and matter) must pre-exist "something happening somewhere" (matter-time-space). In other words, the BB, to be the BB, needs some-where to bang, and some-thing to bang, and some-time (beginning, during, and end) to bang. Without these 3 pre-existing ingredients, there could be no BB.
devans99 wrote:How can something infinite expand?
It can't. The story about an "expanding" universe is today's fiction, just as "flat earth" was yesterday's fiction.
The universe can only be infinite. This is the only solution that is logically coherent.