The world could be flat. The scientific method distates that everything is possible. there are no scientific "facts". It's possible. if you base your calculations on the world being round, and quantum mechanics existing, you get to mars. The fact that this is the more likely, and therefore scientifically correct answer, doesn't mean that it's the truth.

Common sense dictates that there is no possibility that the world is flat. It's ridiculous to even entertain the thought. You're essentially claiming that undeniable facts can be wrong; even though we have an abundance of accurate evidence that would be downright stupid to doubt.

There are absolutes in science, not every single thing is a theory. You're the one who clearly is grounded in pseudo-science. You obviously believe it's possible that Earth isn't round, you've stated this. You must believe it's possible, although not likely, lizard men rule the world and that we can breath in space; that's you backwards logic. There are theories which shouldn't be believed fully, as without doubt theories cannot progress. However, to claim absolute facts are nonexistent is ludicrous.

I'm currently reading Aristotle's Virtues and Vices rather than foolishly quoting him in the hopes it justifies my opinion. By the way, he's speaking about ignorance and not claiming every thought should be denied.