"BC" == Bob Cain writes:

BC Joseph Lazio wrote:

In contrast, the spatial extent of the Universe could be infinite.
If so, it always has been infinite.

BC Another question, if I may. If the extent is infinite does that
BC imply that there are guaranteed to be other regions (...) the size
BC of our visible universe that have the identical quantum state? I
BC seem to remember a Scientific American article that asserted this.

This is starting to veer more into the philosophical rather than
scientific, but I think so.

If the Universe really is spatially infinite, then I think one is
forced to the conclusion that there are infinite numbers of me typing
out this response right now.

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