Re: Are we living inside a black hole?

[Brent Meeker]

On 3/19/2025 9:14 PM, Alan Grayson wrote:

On Wednesday, March 19, 2025 at 3:28:40 PM UTC-6 Brent Meeker wrote:



    On 3/19/2025 4:56 AM, Alan Grayson wrote:

    On Wednesday, March 19, 2025 at 5:40:48 AM UTC-6 John Clark wrote:

        On Wed, Mar 19, 2025 at 4:30 AM Alan Grayson
        <agrays...@gmail.com> wrote:

            /> If the universe is infinite in spatial extent, and we
            run the clock backward, is all  the mass/energy of the
            observable region confined to a tiny or zero volume?/


        *The short answer is nobody knows what will happen if you run
        the clock back to zero, and the mystery remains regardless of
        if the universe is finite or infinite. Nobody knows what will
        happen when things get super small because our two best
        physical theories, Quantum Mechanics and General Relativity,
        disagree with each other. Most believe that something will
        prevent a zero volume from ever occurring, but nobody knows
        what that "something" is. *
        *
        *
        ***John K Clark    See what's on my new list at Extropolis
        <https://groups.google.com/g/extropolis>*


    Maybe it's a 5th force. What I'd like to know is this; assuming
    an infinite spatial universe and that it gets very very small as
    we run the clock backward, the observable regions shrinks, but
    what happens to the unobservable region? Quentin claimed to have
    an answer, but I can't recall what it was. AG

    All theories treat the unobservable regions as being similar to
    the observable (what else could you justify?). So every finite
    region, observable or not shrinks to zero.

    Brent

*But if every finite subset of an infinite set strinks to zero, in the case the assumed infinite set is the spatial extent of the universe, won't the infinite spatial set of the universe also shrink to zero (which is what Quentin denies)? AG*

*No.

Brent*

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