On Thursday, October 3, 2024 at 9:50:12 AM UTC-6 Cosmin Visan wrote:
You can only ever observe yourself. So by unobservable you
mean the minds of other consciousnesses ?
I'm seeking substantive responses, so please refrain from posting
on this thread. AG
On Thursday 3 October 2024 at 17:21:28 UTC+3 Alan Grayson wrote:
To recapitulate and clarify the argument:
Firstly, by "universe" (our "bubble"), I mean the
observable *and* unobservable regions defining our
expanding universe.
Secondly, since our universe is expanding, we could run
the clock backward to any earlier time, and imagine
enclosing it in a sphere, say, establishing that the
observable region is finite in spatial extent. (It's
actually measured to have a radius of 46 BLY.)
Thirdly, concerning the *un*observable region, let's
assume it's infinite in spatial extent. If so, this
couldn't have occurred in stages, say by spatial
expansion, since no matter how fast it might expand, or
for how long a length of time, it would remain finite
throughout, and could never achieve infinite status.
Hence, the only way it could be infinite in spatial
extent, would be for it to be either *UN*-*created*, or
if it had a beginning it must have expanded
*instantaneously* to infinity in spatial extent. These
options are falsified in two ways; first by the CMBR,
which is predicted by the Big Bang. That is, empirical
evidence affirms it had a starting time. And second, as
previously argued, if it is now infinite in spatial
extent and had a beginning, it would have had to expand
*instantaneously* to infinity. Since I consider this
physically impossible -- which is my unproven and likely
unprovable assumption -- by two lines of argument our
universe must be finite in spatial extent.
Final conclusions:, being *finite* in spatial extent, *it
cannot be flat* (despite the consensus view), since that
implies infinite in spatial extent (assuming it's not
toroidal). And there is no need to do any measurements.
Using a purely logical argument, our universe is finite
in spatial extent and cannot have a flat global geometry.
Its likely global geometry is approximately spherical,
since it's expanding in all directions from every point
in spacetime and is approximately isotropic. What could
be *uncreated and infinite in space and time*, is the
substratum from which our universe emerged.
QED, AG
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