We don't need the exact location of every particle to simulate air in a balloon.
To simulate the exact location and momentum of every particle would take a storage larger than the universe being simulated. Because of this simulations are simplifications. We see this all the time. Even General...
The reality we experience could be a simulation. That is, this claim cannot be disproven, no more so than a random creator-god hypothesis. Both suppose that there is a containing reality in which an actor creates a sub-universe within that actor's reality. This does nothing at all to advance the...