david you have several faults in your logic.
first off carbon dating can not used on stone past a few thousand years.
there is artifact called narmers palette that shows the unification of the two Egypt's by the first king of both lower and upper Egypt . this artifact is on one side a geological representation of Egypt. this artifact predates the age of pyramids by many centuries. on the back side there is a pyramid on the geological representation at near the delta and giza. so how could there be a pyramid noted when pyramids were not existent then?
the ancient Egyptians did not know how to make a pyramids with a slope of 51 degrees. all Egyptian pyramids have a slope of 43.5 degrees, except the Giza pyramids.
The bent pyramid was created at the same time as the collapsed pyramid of King Sneferu .
These pyramids had a slope of over 51 degrees. After the collapsed pyramid collapsed….. the bent pyramid ‘s slope was changed to 43.5 degree slope. The bent pyramid had sated with a slope of over 50 degrees but when the first pyramid collapsed the bent pyramids slope was change from over 50 degrees to 43.5 degrees.
There are no hieroglyphs in the giza pyramids so there no evidence that the Egyptians built the pyramids. These are the only Egyptian pyramids that have no hieroglyphs.
No sarcophagus was found in any of the pyramids, but there was fraud involved in the identification of the kings with the pyramids.
The only reference to Cheops is a stela in front of the sphinx in which he acknowledges that he cleared the sand away from the sphinx in return he was made king.
the geological fact is that on the sphinx there is evidence of a great amount of water erosion.
water erosion tends downward and wind erosion gives stratified levels of erosion./ the water erosion is severe.. thousands of years. but there has not been enough precipitation in the nile valley to cause this much erosions for over 10,000 years when the Sahara desert was an vast inland sea.
these are geological facts. the sphinx has to be over 10,000 at the very least.
of course 300 gallons of kerosene brought down a 100 story building so.....so any fraud can be pasted off.
and of course, there is the small problem that using modern technology, the pyramids could not have been built except maybe within the last 50 years of modern technology.,
At the very least 10,000 years. I do not think we are within 50 years of being able to create anything on the scale of a real pyramid with stellar alignments though. Would be cool if I am wrong though.