[peoplewindow]

Flat earthers? Who has ever thought the Earth was flat? Even medieval people didn't think that, it's obvious to anyone who ever watched a ship sail over the horizon that the planet is not flat. They used to think the sun revolved around the Earth, which is a lot harder to check with common sense logic.

[eru]

Oh, I didn't want to imply any one particular society though the earth was flat. Flat earthers are just an example to show that it's not trivial to argue against someone with a weird believe that they are motivated to defend.