"non-deterministic machine" does the heavy lifting here; can we invent such a thing? seems like one of the unanswerable philosophical questions right there, and the evidence so far suggests its answer is "no".

reasoning about what they might be like of we could make one is fine and dandy but its all spherical frictionless cow milk.

as he says, "The universe, fundamentally, doesn't care."

not criticizing: its fun to watch the cow being milked

How about lava-based random number generators or machines based on nuclear decay?

can we really rule out long period sensor bias yet?