radioactive carbon dating - only applicable to past living matter so dating pyramids they use vases not the pyramids themselves....

so its not accurate when they give the 2000-3000 dating of pyramids or sphinx

the sphinx for example has what looks like water erosion which could also be used by digging to date and they would give a much older date than 2000-3000

back to the main point is the pyramids themselves have no method to be tested so they use objects like wood planks near the pyramid to say the pyramids are this old but thats the same if our civilization gets wiped out and someone leaves a modern day wood hammer beside the pyramids and some future civilization finds that hammer and says the pyramids are only so and so date since the demise of our civilization.