Rodney, just for curiousities sake, back on Post #26 I posted a couple of pictures of the Step Pyramid, which was built earlier than the Giza pyramids. Do you see any reason that ancient Egyptians could not have built that pyramid, using smaller stones?
And if they could solve the issues for that pyramid, doesn't it seem logical that they could have solved it for a larger one, using lessons learned and building upon that experience?
As others have said, the Great Pyramids are there as evidence that they were built. Workers quarters nearby have been excavated, the stone beds where the rock was hewn have been found, and several posters have mentioned various discoveries made that might help explain how they got the stones up the ramps.
Upshot is, there is much that can be done with human labor and ingenuity, even if we have some questions on the precise manner that they did it. No other therory can account for the facts (workers quarters, stone beds, earlier pyramids, Pharoh's orders, the smaller pyramids next to the Great ones) as well as "The Egyptians did it--with sweat and labor and a great deal of intelligence.
If you have one that accounts for the Pyramids better, I wuld be most interested in hearing it.