> the universe would be like the inside of a sphere. The surface of which is "flat"? The interior surface, if that's the right word. Like living on the Event H

> the universe would be like the inside of a sphere. The surface of which is "flat"? The interior surface, if that's the right word. Like living on the Event Horizon of a black hole. So we don't and hardly can know what's outside or inside or on the outside or inside.