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.

How do they explain airplanes taking the same time to go around a northern fixed-latitude ring and a southern fixed-latitude ring?

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

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.

But then how do we get delicious cheese ?

that's amore

Can’t land on a lie.

I wonder are there flat earthers who are also simultaneously NOT moon landing deniers? Or is that like a prerequisite.

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.

Do not underestimate a human's ability to delude themselves or, more importantly in this case (in my opinion) buy into being part of a social group. Flat earthers have a pretty active social community going online and some people will absolutely buy into the things they say just to be a part of it. And this isn't some 'I'll just pretend to so they'll talk to me' thing, they will convince themselves they're true believers. The belief in a flat earth is often downwind from the belief in other conspiracies, things that may be pretty benign or just outright true (Tuskegee experiment, MKultra etc), putting Flat Earth on a path from the benign to the deeply harmful, like Pizzagate or raging antisemitism.

In all this, community is extremely important. If a person loses this access to the community, their beliefs may turn somewhat more mainstream. We see this with cults too, though I'm not saying Flat Earthers are a cult by any means.

Anyway, there are Flat Earth books, podcasts, YouTube channels, conferences, you name it. There's a real dedication to showing everyone in the community just how much you bought into the thing. I think approaching this from the standpoint of 'this is a personal failure for the one believer' doesn't provide us with any answers about the 'why' of it all, nor will it necessarily help anyone with leaving such a worldview.

Anyway. My two cents. The best way to make sure someone leaves a cult or a toxic worldview is to allow them to be part of communities that aren't that cult or that worldview. The more insular you force them to be, the more insular they will become. Within reason of course and especially with cults, within what's safe for everyone.

Sorry, long ass post. Tl:dr, they don't necessarily believe the earth is flat, they believe that they believe it because that allows them to join a social group.

One thing that gave me a different perspective on this is that conspiracy theorists tend to believe a whole load of conspiracy theories. And the conspiracy theories that people believe follow certain patterns: they can be falsifiable, but not so easily falsifiable you can't come up with some arguments that take real work to debunk. And while they obviously contradict mainstream beliefs, this combination alone is not enough. Basically, someone needs to plant the idea for it to spread: most people aren't deciding for themselves that everyone is lying about the Earth being round, they get it from someone else.

I think all this tells us that it's not really about the facts. There's a cognitive bias at play here which engenders belief in things which enable the believer to feel like they're in on a secret and are therefore one above the common person.

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"?

"Clearly, the moon is fake and gay"

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

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.

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.