...or perhaps, when you see the picture below, you might think of it as the Roulette Wheel Earth Theory.

The theory mentioned by the reader is reminiscent of, or perhaps identical with, the Nazi Hollow Earth Theory, in which the Earth's surface is a spherical cavity in a universe of infinite rock. [This is not to be confused with the more common hollow-earth theory in which we are on the outside but there are openings at the poles to a hollow interior populated by a more advanced civilization. Both hollow earth theories suffer from the inconvenient physics of gravity, which would cause objects in the interior to fall to the geometric center of the cavity, where an Inner Sun is presumed to be located.]

In contrast, the Square Earth Theory is based on its formulator's novel interpretation of certain Bible passages, dependent on a belief that God is incapable of symbolism, metaphor, and allegory. This theory would presumably have no gravitational problems as those would be taken care of by God.

The graphic below is a thumbnail of the full size 2088x1432 image, which can viewed by clicking on it. You will probably have to click again to get your browser to fully expand it so you can read the fine print at the bottom: