Hey I'm kinda new here. Why are there so few threads? To me there seems to be two ways to prove the earth is round: if a plane can fly across Antarctica, then it supports the round earth.
This really depends on the flat earth model as well as the path the plane takes. There are bi-polar FE models, flat plane concepts, infinite plane concepts etc.
Things like the dome or ice wall only exist in a portion of all flat earth models.
A second way is to measure the distance traveled by a plane from Mexico to Japan, heading WEST. If the distance is greater than the distance EAST from Mexico to Japan, then it supports the flat earth. Have these things been documented I don't know. Just some thoughts!
The flight time debate has been going on forever and some FE models are strengthened by these flight times/distances and some are weakened. In addition evidence has been provided which calls into question the accuracy of flight speeds and distances.
2. Why can neither you or any other FES provide any proof at all that the world is flat? All ideas proposed, which would prove a FE, are dismissed due to one impossibility or another.
When you start asking for PROOF I would argue that nothing is PROOF. There is EVIDENCE which I have found which weakens claims made in the RE model and evidence which strengthens the different FE models. If you took me up in a spaceship and showed me a spherical earth that does not PROVE that the earth is a sphere. It provides very strong evidence that my visual cortex did it's best to make an image and that the image it decided to make was a sphere. Unfortunately that's not PROOF.
The same applies to the different FE models. There is EVIDENCE but no PROOF.