Joseph Lazio wrote:

The problem here is that many people (based in part
on poor descriptions from my learned colleagues)
think that the initial singularity in the Big Bang
model was a point in space. It wasn't. It was a
point in time.

If you extrapolate backward in time, we reach a
point at which our understanding breaks down,
because the temperature and density of the
Universe become infinite.

Would it help if you could extrapolate backward in
time and, subject to the hypothesis summarized in my
other post in this thread, forward in time in some
other spacetime framework and pursue a "meet in the
middle" strategy?