Nope, no "deterministic guardrails" for you. The domain is simply far too broad and unstructured to allow for that.

Unless you mean "a typical AI with all the computation constrained sufficiently to always unfold the same exact way, given the same input". In practice, that just kicks the can to "given the same input" street.

The noise in the system is going to come from the input plane. Which is, I remind you, facing the real world. It's full of noise.