If you want to see that this is true, Google or Youtube search on "flat earth society." Everyone knows the earth is round, except the people of the flat earth society(ies). And the reasonable quality of the websites and Youtube videos shows us that there is money behind it all. But just how much can you lie to people before they won't believe you any more? Apparently flat earth people are generally ignorant enough that you can lie a lot and get them to believe.