Everything was the real world. You're going to have to accept that at some point! [ she rubs out the line she drew, and instead draws a circle ] Pretend this circle is my game session. [ and another of the same size next to it ] And this is Dave's game session. [ a couple more circles for good measure, and then she draws a large circle around them all ] And this big circle contains the furthest ring, the Green Sun, and everything else that is part of the game's function but not attached to any particular session. It's where you exist when you die or sleep, and although it's difficult-- nearly impossible, under normal circumstances-- you can travel from session to session sometimes.