This honestly gets complex because there is also ways to minimize uncertainty in some situations using entanglement. It also depends on the sensor accuracy and the likes. Because in most cases the odds of something diverging at the scale of say the solar system is very low. Multiple lifetimes of the universe low. Though honestly I wouldn't use modern day thoughts on physics on something like this simply because the principle used in a story can be anything it needs to be to make it possible. It just comes down to how much the writer thought on it.