The links MF posted says these morons want proof with their eyes. There's simple proof in the sky trek of our sun and moon. They would travel at greatly varying rates not only to their current path, but also depending on which city you were in and its location on this "disk." They can even see it for themselves if they choose. Turn on a lamp. Now get a coin and imagine a spot on it as being your location. Now, rotate the coin at a consistent rate. They could even glue something to represent a tiny building or something. Now do the same with a golf ball. See on which one the light behaves more like our sun. Also, thank God our orbital axis doesn't run right through the plane of the disc, where we rotated like a DVD instead of a spinning coin. Freakin' morons.