In a simulation everything is known which makes any apparent random event a pre-calculated event.
Taking that into account is it possible to simulate the universe with absolute accuracy in a way that results of jumping forward at any point in the simulation are pre-determined.
PS: This question is not about to simulate it is more like 'if universe was a simulation' or if it can be simulated assuming that it is possible to know everything.
To be clear on what I am asking. If everything was known, will there be any randomness which can make it impossible to simulate the universe with absolute accuracy, and make knowing everything incorrect?
Actual question I had was "if universe was sent back in time and resumed from there will it reach exactly the same state from where it was sent back?"
If two exactly same isolated universes were started in parallel, will the remain exactly the same in course of their duration?