I plan to set forward a number of very simple rebuttals across several disciplines as to why FET cannot be true.
1. History: Several antarctic explorers have ventured to the magnetic south pole, and found articles left there by previous expeditions. THe most famous example is the Scott/Amundsen antarctic expedition. How is this explained by having a great ice wall? If it were only one expedition, I could believe it was a cover-up; but the sheer number of expeditions to the south pole make this explanation implausible.
17th century sailors reported seeing the masts of tall ships before the hulls. What is the explanation for this discovery?
2. Geography: If the world were distorted to account for the FET, then Australia's landmass would be several times larger than it has been measured to be, and Alaska would be smaller than Texas as it is closer to the North Pole. Is every cartographer ever part of a cover-up?
3. Physics: If the earth were flat and accelerating upwards at 9.8 m/s^2, then what prevents the atmosphere from spilling out over the Ice Wall into the black abyss? Magic?
Lab experiments have shown that even at a small scale, gravitational forces exist:
http://www.physics.arizona.edu/~haar/ADV_LAB/BIG_G.pdf What is driving this?
What forces keep the sun in the sky? What is cosmic background radiation's source? etc.
4. Logic: Much of the proof of round-earth theory has been discredited by flat-earthers as part of a government cover-up. I ask you: who is profiting from this cover-up? why would it be perpetrated for so long and so effectively?