Jean-Pierre Houdin's theory gets rid of the long ramp used for dragging stones up to the Great Pyramid. But to my mind sets out a few extra questions.
A/. There are remains of ramps used in building some of the smaller Pyramids.
B/.By using this exterior corkscrew ramp...would they have had to drag and fill (towards the center) the interior of the pyramid as they progressed up? A very very rough real actual up and down movement of the heavy stones would have to have been done before fitting.
C/. The exterior corkscrew ramp could not have been any wider than a stones width or length. Prehaps not more than 3 or 4 stones, (in single line) could be taken off at a time? Not forgetting the groups of men in between any two stones on the ramp, in sufficient numbers to drag up their particular stone?
D/.The Great Pyramid was supposed to have taken just 20 years to build. The number of stones it contains is estimated at about 2.4 million. I think that means, - ONE stone had to be cut, quarried, moved and fitted into place every 90 seconds.
Is that possible? Especially when using a circuitous narrow one-lane ramp, that held a single line of stones, that had to be hauled up, then pushed inwards, over others for final fitting?
Something wrong somewhere.

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"You will never find a real Human being - even in a mirror." .....Mike Kremer.
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"You will never find a real Human being - Even in a mirror." ....Mike Kremer.