Or the giant statues that had to be cut into chunks to be moved when the Aswan dam was built. Apparently Egyptians without modern tech could make those statues and move them many miles somehow. And how the faces are symmetrical to within a mm using hand tools is also a mystery. Not to mention the very apparent rotary tool marks. Pretty clever use of bronze tools, eh?
I was going to bring some of that stuff up that we have been unable to reproduce or even figure out how they did it, but it wasn’t worth it. He can believe in fairy dust all he wants.