If the earth is flat then how come when you go south, crossing the equator that Polaris disappears over the horizon? This cannot be explained by a flat earth because from any point on the flat earth I should be able to see all the stars no matter where I'm standing.
Don't give me an answer without any evidence either, plus the star Polaris is a fixed star in the sky so it isn't moving. (From our perspective)

Not only does this happen with Polaris, it also happens with any other fixed star in the sky.