Level
This one elicits a blank stare. This person used a level to check if a flat surface was even and level. Since then, he’s argued that this proves Earth is just flat. In order to determine whether or not the Earth is flat, how large a level would we need?
It’d be a huge deal. Just to see what this guy has to say, we want to get into an argument with him. This guy is going to be busy for a long time if he plans to do this to the entire Earth. It’s a pity. That’s up to him to decide on. He’s the one who thinks the Earth is round, not spherical.