Destiny is something you look back at afterwards, not something to be known in advance. - Haruki Murakami
It is shown for some CA rules, that you cannot obtain an analytical expression that tells you the state of the system after n steps. The only way you can know that state is to actually run that computation.
It’s not possible to short-circuit the computation a complex system is doing by world models or any other means. You have to run the computation, due to small errors quickly amplyfying.
Computational irreducibility (practical) unpredictability for exact microstates, but…
Unpredictability computational irreducibility, as you can be unpredictable due to stochasticity, chaotic dynamics, …
Computational irreducibility can’t make useful macroscopic predictions.