But if an earthquake strikes an empty building and stuff moves without anyone seeing it everyone will still see the same results afterward.
And? All of the minds in the simulation would inherently be connected, otherwise the aforementioned "running into" another of the simulated minds wouldn't be possible. Basically, they're all synchronized. So when the first person goes into that building the simulation would generate the inputs and then store that knowledge in the "RAM" so that it could give the same inputs to the next person to come along.
There's obviously got to be some kind of overall framework outside of just the minds in the simulation if they're going to all be experiencing the same world. But storing data like that is not the same as simulating the entire planet.
Of course, that is all assuming they do all experience the same world, which isn't in any way a given. Every single mind in the simulation could very easily be experiencing a wildly different world, so their interactions would never actually be between two distinct simulated minds.
That's an incredibly interesting thought. ---
Typical gameFAQers are "Complainers that always complain about those who complain about real legitimate complaints."-Joker_X