The Machining Anachronism
The precision of granite work inside the Great Pyramid (0.001" tolerance on the sarcophagus, spiral drill marks in core holes, optically flat casing stones) is inconsistent with copper tools and sand abrasion — the only technologies attributed to the builders by conventional archaeology. The drill core samples analyzed by Petrie show a feed rate and cutting speed that would require modern machinery. Either: (1) the Egyptians had tools we haven't found, (2) the stone was cast/molded rather than carved (Davidovits' geopolymer theory), or (3) our understanding of the builders' capabilities is fundamentally wrong. Each explanation has profound implications. The geopolymer theory is the most testable — chemical analysis of block composition should be definitive.