This is a Triumph.

Just to point out that, despite what a lot of people strongly believe, the Moon does not move in the sky at the same speed as the Sun. So they both can be visible at once, or neither.

Until you see a 24 hour sun in Antarctica.

Was going to say... It's not rocket science

I saw an animation once where the sun sort of dipped and peaked above and below the world disc horizon. Total mental gymnastics

Oh it is explained, though, but not consistently. I have heard explanations of that the light refraction makes the sun look lower when it moves away, to a point where its visibility is hidden by the horizon, like a mirrage of the sky. Another explanation is that the surface of the earth isn't flat, but bulges slightly, like a dome, making the sun disappear behind the dome every day. I'm sure there are more explanations as well.

The thing about flat earth theories is that they always have an answer for whatever you throw at them. They are so committed to their idea, that they will invent reasonings on the spot which become more and more convoluted - often in conflict with other parts of their theory.

"Clearly, the moon is fake and gay"

"The Moon was created by Islamo-Communists to make Hot Blooded Americans go to sleep!!"

How do they explain seasons, solar eclipses, lunar eclipses, lunar phases, tides, polar nights, polar days, etc?

The moon is a sticker on the sky which is a big glass dome with holes in it. Or something like that, honestly they're not really very consistent.

So, they aren't exactly a monolith, different folks have different ideas. But generally speaking, they beleive all celestial bodies are basically spinning above us. I know they consider the sun to be actually really small and shockingly close to the surface. Generally the idea is the antarctic is the rim of the disk, with a giant ice wall that keeps the oceans in. Gravity is an illusion caused by the Earth constantly accelerating upwards.

I was about to say that. Isn't it something like "it just randomly travels from left to right in mid-air, but due to optical illusions it's not visible 100% of the time"?

The moon is a transparent light source.

You might be asking yourself how does a transparent object generate it's own light? Well let me explain: trust me bro.

I'm part of some flat earth debate groups because I like physics... they're real

Mostly it's a religious thing. These people you have to just ignore because you can take them to space and push them out into the void of space with no helmet so they could see the round spinning earth with their own eyes and the last thought that would go through their brain before they froze in the vacuum of space would be, "the devil has taken control of my vision"

I'd guess the 2nd most popular group of flat-earth supporters are just weird-o conspiracy people. The government lies about everything and since NASA is a government agency it too must be lying.

Then you got the people who are dumb and know they're dumb but after a lifetime of being called dumb have convinced themselves that they're actually the smartest person in the room and the only reason everyone thinks they're dumb is because everyone else is too dumb to understand their genius. These people think they know everything about physics but the shit they say just showcases their complete inability to understand even the most simple concepts

And then you just have people who just don't know any better. Like maybe it'll be a guy who's profile picture is him with some goats in a small village in Africa. He's well meaning but he knows nothing about relativity or gravity because he never really went to school and the education he did get was just from some other person in his village doing their best. You don't really need to understand relativity to survive in the deserts of Africa and so it's not well understood out there. This man walks 50 miles a day and has never seen a mountain in his entire life. All he's ever known is flat lands and dirt. Then one day he travels to a near-by village with electricity and gets on the internet only to see a bunch of crazy white people talking about how water sticks to a spinning dirt ball in space and he laughs. Silly city-people, they don't know shit.

Probably for some of them (e.g. the one making videos). Definitely not all of them.

Believing something wrong is not really a reason to hate someone though. We all have varying degrees of wrong beliefs - if anyone thinks they don't, well ... that's an excellent example.

What if the underside of earth had stuff down there?

That's where you get a lot of the real 🤯-tier pseudoscience and pseudohistory.

Dinosaurs and lizard people are down there. Nazis and Communists are down there. Mole people. Atlantis. The Garden of Eden. The sky is the limit.

Yeah, that's how I've seen them describing near-equator orbits more than once. (Back when the entire thing was an internet joke, the models were very funny.)

It's polar orbits they have an issue with.

This is because flat earthers don't understand anything about science or physics or basic common sense and as a result believe the most insane things.

They spend their entire time trying to come up with increasingly convoluted ways that a flat earth could work, rather than just accepting that the simplest explanation is that, in fact, isn't flat. Their explanation for why you can't see mount Everest from the top of any reasonably high hill anywhere else on earth, involves throwing out all scientific thinking back to Aristotle and starting again, don't believe in geometry or infinitely parallel lines.

I'll stop you at 'they actually think'.

They do not think, at least not as we know it.