Recent surveys of the Great Pyramid show an internal ramp

The argument

A French team surveying the Great Pyramid in the 1980s revealed a spiral shape pattern they did not understand. The team were using a technique called microgravimetry, used to measure the density of buildings in order to find hidden chambers. Not until Jean-Pierre Houdin met with the archaeologists did they understand this spiral was likely to be an internal ramp. This is the best evidence anybody has come up with so far to prove any theory about the Pyramids at Giza. Further exploration of the Pyramids confirmed another elements of Houdin’s theory. A notch visible from the outside, 270 feet up, may have been one of the notches used in the construction. According to Houdin, the pyramid would have needed notches on the corners for the internal ramp to work, these would have been the last part of the pyramid built, and would have been filled in at the end. The notch is set into one of the corners and would have had a crane attached to turn blocks across the 90-degree angle. The notch has an L-shaped room behind it, which may have been the intersection of two parts of the ramp. This room would have allowed the workers to fill in the corners at the end of the pyramid’s construction. The four edges of the pyramid were the lowest density part of the building the 1980s survey. Finally, in 2017, a hundred-foot-long void was detected in the Great Pyramid using muon radiography. The chamber is very similar in its dimensions to the Great Gallery beneath it and is conveniently placed in such a way that it would have been ideal to move blocks into place over the King’s Chamber. Recent surveys using different archaeological and scientific techniques have confirmed there are spaces inside the pyramid which may be the remains of an internal ramp.

Premises

Counter-arguments

Some of the investigations that have proved Houdin’s theory have come from companies attached to him personally. It is possible he is interpreting facts to suit his own conclusions and more scans and surveys need to be done. So far muon radiography has only confirmed the existence of one void in the pyramid. Without opening the pyramid it is impossible to confirm what it was used for. Houdin's theory is not yet confirmed. Some of the investigations done may have been biased.

Rejecting the premises

[Rejecting P1] A microgravimetric anomaly is not a confirmed ramp: the 1980s survey recorded a density pattern its own authors did not interpret that way, and the reading was supplied afterwards to fit the hypothesis, while the muon imaging since carried out has confirmed a large void without establishing what it was for. [Rejecting P2] The comparison is not like for like — the rival ramp theories rest on physical remains at other sites, such as the Hatnub ramp, whereas this is remote sensing of a single structure, and as the counter notes several of the investigations were run by parties connected to the theory's author. [Rejecting C] Confirmation would require excavation or direct access, neither of which has occurred, so the model remains an interpretation consistent with the data rather than one demonstrated by it.