As is the usual case, these flat earth discussions often degenerate into complete nonsense. And I confess I am as guilty as anyone with the comments on elephants and moonshrimp.
But the original intent was just to see if there really were any real people who really believed the earth was flat. Apparently there are some. Then so be it.
Mission accomplished.
One more thing before trying to bow out of this thread (which I probably won't....LOL)
On a clear, calm, sunny day , with no unusual atmospheric (or atmoplanic if the earth was flat) conditions, I would like to see some person - "flattie" or "roundie"- go out to sea or down to the shore and take a picture looking out to sea.
If the picture shows just an indistinct blur that fades away at some indefinite distance, that should prove the earth is flat , as the flat earth says.
If the picture shows a distinct line where the sea and sky appear to meet and you can estimate how far it is to that line according how high above sea level you are (about 2 or 3 miles if you are about 5 or 6 feet tall and standing on the beach with the water tickling your toes)...that should prove the curvature of the earth and the earth is a globe...as the globe earth says.