To be convinced the Earth is flat is ridiculous on so many levels. You say they watch a youtube video confirming they're right in their primitive observation. OK, what about the easy availability of videos to the contrary?
It's not enough to be stupid to be a flat-earther. You need to deny official authorities, believe in a conspiracy, and have an arrogant attitude of thinking of yourself as smarter than other despite being an idiot. So this is not a problem of some people simple being born with inefficient brains.
More importantly, you seem to ignore the 9%. To seriously consider the earth maybe is flat is already pretty damn ridiculous.
> It isn't trivial to prove the earth is flat
Of course, because it isn't. If you meant it isn't trivial to prove it isn't flat, well, in general it is hard to disprove an idea that isn't specific. But take any actual model of flat Earth, describing the movement of the Moon on quite a low altitude and it's trivial to prove it's wrong simply by looking at the Moon and always seeing the same side regardless where you live.
It's not enough to be stupid to be a flat-earther. You need to deny official authorities, believe in a conspiracy, and have an arrogant attitude of thinking of yourself as smarter than other despite being an idiot. So this is not a problem of some people simple being born with inefficient brains.
More importantly, you seem to ignore the 9%. To seriously consider the earth maybe is flat is already pretty damn ridiculous.
> It isn't trivial to prove the earth is flat
Of course, because it isn't. If you meant it isn't trivial to prove it isn't flat, well, in general it is hard to disprove an idea that isn't specific. But take any actual model of flat Earth, describing the movement of the Moon on quite a low altitude and it's trivial to prove it's wrong simply by looking at the Moon and always seeing the same side regardless where you live.