>The Well Shaft was closed off above the Grotto, and built over for approx. 15 layers of >core blocks because it was, apparently, no longer required, but it was later re-opened by >tunnelling down through the 15 or so layers and building a shaft up as far as the north >end of the Grand gallery.
>This doesn’t fit the “workers post-sealing-the-Ascending-Passage escape route” scenario >at all well.

They built the pyramid right on top of the grotto.

How would it no longer be needed? What was its purpose
before they built the pyramid? What evidence is there
that the lower portions of the workmen's escape route
pre-dates the opening of the opening of the higher sections?

If something as fundamental as digging a new passage can
occur then why is it not even possible that there was a very
fundamental change in the use of the pyramid after construc-
tion began? Isn't it possible that even the sealing of the
ascending passage might be part of this fundamental change.

The explanation that they hadn't counted on the need for
workmen to get out just seems inane. People do stupider
things but this is not only (literally) monumentally stupid
but almost certainly unnecessary. It was easy enough to
make an automatic system to roll these spherical blocks or
one that could be operated remotely.

These things of which everyone accepts to be so certain look
improbable to even be true.

____________
Man fears the pyramid, time fears man.