Well, yeah, if you think about it. If this one exists, and the aliens sent us here, then the world we live in is in a different place! Then that means there could be other worlds too! [so he probably is just taking these explanations from manga and games he's played...]

...Yeah, that's the only down side. Can't log out of The World. [siiiigh.] Though... some people have found a way out, somehow. I don't know how they did it, but I had a friend who managed to do that.