This is the theory that the Earth is indeed flat, but is suspended in a sort of gravitational sphere. This causes it to rotate, but retains it's flat shape and thus offers another theory to add to the pile of possibilities.
I did not come up with this theory, and hold no claim to it's origins. It's wonderful to finally find a group of people that see the truth.
I am sorry for the small substance with my summary, I just wanted a quick "TL:DR" version, per se. If there is enough interest I will explain this theory in more detail. Be well!