You stated: "It goes DOWNWARD into the earth;
it's not a "ramp" that inclines UPWARD to aid the construction
of higher courses."
I see. It was made to go down only.
The removal of debris from the lower course would
by your definition be impossible.
You then stated: "By that definition, the Descending Passage in G1 a "ramp".
Yes. We agree. Debris was carried up the descending passage, and removed.
All the best,