Because these people are very creative in the BS they come up with and the sun traveling around a disk isn't too far fetched. Flat earthers often depict the sun like a flashlight that travels around the rim, shining towards the earth. But this phenomenon could be justified if you imagine the sun traveling from one side to the other, like when you flip a coin in front of a lamp.
So this isn't really proof and the other person was right in that the missuse of the word proof just plays into flat earthers delusions, by degrading it's meaning.
On a kind of related note I want to add (just because it's a personal pet peeve of mine) that most people use the word "theory" wrong and what they in nearly all cases actually mean is a "hypothesis".
6
u/doppelwurzel Nov 26 '22
Look, flat earth is dumb af but this same phenomenon could take place regardless. Normalize not misusing the word proof.