For such proof to be effective, one has to trust lot of formulas from physics books.
(Source of flat-earthery is extreme distrust in everything that is not a first-hand experience. You can’t prove much if your limited exclusively to first hand experience)
The thing about the whole flat-earth rabbit hole that's always logically confused me is the epistemology problem.
If you deny X, and then you carefully deny anything that could prove X... what do you replace it with?
F.ex., I get how someone could disbelieve the current physics of motion. But then how do things move? It can't all just be dice rolls and unexplained magic.
If you toss out the way we understand things work... there still has to be a way things work!
