Hello!
If you are talking about the idea about people who think the world is flat then I can help
So evidently there is this huge debate on whether or not the world is flat, or if it is round. Now for people who think the world is round: you are correct. If you are people who think that the world is flat then let me say this: By saying the world is flat you are proposing that thousands of space agencies are potentially lying to billions of people. So is 99% of the world right or are you/ the 1%, are right.
I hope it helps!