Here’s one. With a household intermediate telescope, on top of Mt Everest, one should be able to see the ENTIRE disc, everything on the continent. Every major city skyline, The Pyramids, at least the damned ice wall. This theory has been around long enough to prove something as silly as a massive ice wall surrounding our perimeter. Where does magma, lava, liquid rock come from?? From the depths of a flat earth? So, what we float on a magma ocean? and beneath it is more ice? How does flat earth explain volcanic activity? How does flat earth generate a magnetic field to protect us from the sun. We certainly need UV protection for our skin. Flat earth has every hole imaginable in it’s logic.