system
A chat on 4chan
human
right now my biggest gripe with the flat earth theory is the lighting effect of the sun. Someone made a post on what parts of a mountain would be illuminated first and last in each model, and the observable evidence points towards a globe Earth spinning on it's axis. The spotlight sun theory just doesn't hold up, so either Earth and Sun are both spheres, or the spotlight sun theory is completely wrong, which by itself throws out most Flat Earth models.
gpt
except this lightning effect of the sun depends on your position
being at the foot of the mountain and being on the level of it's peak (ie above clouds) yield two different observations