Look at the left example. Now consider that we add in a dome that refracts light more and more as the lenght between the dome and the sun increases. Do you see how the results would change? You are literally changing the way that the light moves. How the hell can the results not change?

@Gooberry Well, the amazing thing is that it is not a matter of having no evidence in this case. If he is unable to resolve this problem then a flat earth is, without a doubt, debunked. 

 I really see no way of resolving the problem though. If the dome refracts the light in a way that makes the sun not change size, because the light is refracted, the shadow experiment will not work anymore. He needs to invent a Schrödinger's dome or something... Just kidding, that would not work either. 

@Erfisflat Wrong. We will try again. "Explain how exactly an invisible dome would refract the light to make the sun look like it does not grow while still not contradicting the shadow experiment."

 You do realize that, for this to happen, the light from the sun has to be refracted in two different ways simultaneously, right? Meaning it is impossible. 

 Morality is an arbitrary concept. Anyone can say "I'm moral!" and no one can object to that statement even if the person is a child molester or killer. Moral laws are not universal and deciding what is moral or not depends on what moral laws you accept. 

 "Human life is valuable" majority agree with this statement but it is no more than an axiom that people accept without any reason. Why is human life valuable really?

 My point is: If you live according to your own moral laws, you are moral. It doesn't matter what those moral laws are and it doesn't matter where they stem from. 
"Killing is moral." thus, killing is moral.
"Raping women is moral." thus, raping women is moral.
"I am an atheist, but I am still moral." thus, this atheist is moral.

 Everyone says that it is a masterpiece, but I just can't see anything in it.
-The acting of the child is cringeworthy.
-There is an unneeded supernatural plot that the movie would be better without.
-The movie becomes TOO predictable at the end.
-It does these "pauses" to build tension but they end up just boring you instead.
-There is a tense music after... everything really. I could swear that at least %40 of the movie goes on with some high pitched, tension building music in the background.
-That fucking "redrum" scene with the child... I tried so hard not to just stop watching the film after that.
-Nearly no scene manages to be scary.(except that one scene with the two girls standing at the end of the corridor. That was actually a well-executed and scary scene.)
-"The Shining" has nothing to do with what the film is about. The black guy explains what it is but it plays no fucking role except the child sometimes makes faces when events happen.
-So, what happenned to the child exactly? The demon said that the boy was no longer there but the mom was a little too busy with fighting her crazy husband so she didn't care. The demon just got bored I guess?
-Jack felt so powerless. Yeah, his build-up was good but when the time came, it felt like that tension was built up for nothing. He wasn't even a real threat. He just killed a black guy that literally no one cared about. The mom and the son escaped without a scratch.
-Remember the 2 little girls? Yeah. So, what exactly was their deal? Oh, they were just a cheap way of scaring the audience because they couldn't find anything else and had to make something up? Okay then.

 I hate this movie so much. I was hyped for it, too. I thought that, it has to be so good! These many people can not be wrong about this one thing! And guess what? They fucking were. Worst movie I have ever watched. I have seen bad movies, sure. But this was hard to watch.