Fact: Bible chronology says the flood occurred between 2348 and 2370 BCE, depending on which scholar you listen to.
Fact: the Great Pyramid of Giza was constructed 200 years before, in c. 2560 BCE.
So, if you believe in a literal interpretation of Noah's Flood, you believe that the Egyptians built a great civilization, were destroyed by the flood in 2370 BCE, and then somehow, they reappeared immediately after the flood, picked right back up where they left off without skipping a cultural beat.
Oh, and isn't it ironic that legitimately studying the Great Pyramid of Giza debunks JW mythology now? We've come full circle! A "Great Witness" indeed!