I'd love to see his explanation of the seasons on a flat earth, or the six months of daylight and daytime in Antarctica, it's easily explained on a globe but you'll never get an explanation of it on a flat earth model, nothing that would make any sense to a normal person.
That is the thing that I find, and it is fascinating. You can't seem to get any explanation, diagram or anything out of them. When you do, you end up with some really fantastic complicated things.
Nukeastlefan, I know what you will say to this so don't bother replying to this one. I've heard it before and I'm trying to have a discussion with someone a little more advanced.
Take the reality model and the basic questions you ask. Why do you have night and day? A globe which spins. Explaining why it spins is harder, same as orbits and gravity while simple in some ways is complicated in others and scientists don't really fully understand it, but can measure the effects with amazing predictability with equations. So lets get one of those big inflatable gym balls, stick a GoPro camera to it to simulate us and spin it around in a dark room with a single lamp. Do we get night and day - yes. Then ask why does the sun always rise in the east and set in the west? Well, we have already answered that and have video evidence to show how it works. Doing well. It also explains why it is light here and dark elsewhere. It all fits nicely.
Then we look at why the night sky changes from night to night. Why do we have summer constellations and winter ones, that repeat exactly year on year. If you have a big enough room you can still do the same. Stick pictures of star clusters on the walls, put your lamp in the middle and walk around it while spinning your ball. Great, we have demonstrated that effect works too. So we started with a globe, expanded that by spinning it then expanded again by it being in orbit. 3 things, all making it work. But the way we observe the stars don't quite work when you consider the view points from other parts of the earth. So our model is falling down a bit.
Then look at the seasons. That doesn't work either, but tilt the earth 23 degrees, you have the north pole further away in winter, closer in the summer (summer for us, winter for the southern hemisphere). That works, and also explains what you described of the permanent day light followed by permanent darkness at the polls. And we have just fixed our observational oddity I said above. Why does the sun, at midday appear in a different position day to day, but in the same place at the same time year on year, and if you record that makes a figure 8 (a bit of a squashed one) in the sky? Oh look, that is also explained.
Now consider the moon. What if that was a ball in orbit of us with a gravitational pull of its own. What effect would it have on large bodies of water and how would it look from night to night. All of a sudden we have just cracked tides and phases of the moon, along with solving both lunar and solar eclipses.
Now you consider the planets. Make them all behave the same as us, put us as the third one out, make them spin too and give them their own moons. By using the same concepts we have just explained the phases of the inner planets, the retrograde motion of the outer planets why they brighten and dim, why you can observe them rotate and why with a £150 telescope you can see moons orbit the likes of Jupiter and Saturn. Observing the shadows of the moons pass over Jupiter is a common thing.
Basically a handful of concepts repeated makes something that exactly matches observations and at the amateur level is predictable by mathematics. The majority of the maths is really just down to simple geometry. I think there is a certain beauty in the simplicity of it all. My tool of choice is a computer simulation to check out some of this, but there are some amazingly beautiful orrerys made of brass and/or wood, some amazing craftsmanship that are stunning to look at, but that also accurately model and predict what we observe.
Then you have the "alternate shaped" earth ideas. I've yet to see anything that can explain the first step of night and day. Even when they do, it doesn't explain why it is dark in Australia and light here. One thing I saw was demonstrated as the sun being like a disk on a tilted table and it slid back and forth on this table which made it disappear from view. It leads to the questions, what is the table, why can't we see it and what drives the sun to move back and forwards along it. You don't believe in gravity and have replaced it with a sun on a table on some sort of spring?! Then you consider that even if this did work, it doesn't explain why it is getting dark in Norway an hour or two before it gets dark for us. Each country has it's own sun and old sliding table? Start to add tides and seasons to it all and those that have been inventive enough to create cosmic contraptions end up with this model of the flat earth that is like the setup of Mouse Trap, all these crazy things to keep bodging in something else.
You start to get some hilarious conflicts too. They like to talk about the Bedford Levels experiment of which nobody has been able to produce the same results, because light always travels in a straight line. But then explain ships disappearing over the horizon and that is because light bends after a while. So light acts one way when disproving the globe but bends for unknown reasons when proving the flat. They get very confused with that one.
The idea of a dome and a projection gets even sillier. If it was cloudy at projection central, the sun and stars would go out. Try to make a projector of Jupiter with the shadows across it's surface or just the shadows of mountains on the moon and it gets even more complicated. Because it behaves consistently like globes and orbits you end up in a situation where such things could only happen if this had been deliberately designed and maintained, just to trick you. That takes on a whole new level. You then have to consider what is driving the projector and the images we see and you get into something else really special and more complicated by gravity, the thing they were trying to get rid of.
It is one reason why these nutters fascinate me. Basically take something relatively simple, throw it out as conspiracy and replace it with something incredibly complicated that doesn't work.