alt Hacker News+1000, and the role of non-deterministic security is to compose deterministic security primitives.
Deterministic executes fast and you know what it will do. You want to evolve your ground truth, not hope for the best.
That said, there is a role for probabilistic elements in the security model...as bait and signal.
I don't think the point here is to fully replace deterministic with non-deterministic-based access control. The point is to combine the traditional manual/coarse-grained deterministic access control with an additional layer of dynamic, fine-grained non-deterministic access control.