[noduerme]

But we don't need to know all the things that could happen if M joints moved in every possible way at the same time. We operate within normal constraints. When you see someone trip on a sidewalk and recover before falling on their face, that's still a physical system taking signals and suggesting corrections that could be simulated in a relatively straightforward newtonian virtual reality, and trained a billion times on with however many virtual joints and actuators.

In terms of "world building", it makes sense for the "world" to not be dreamed up by an AI, but to have hard deterministic limits to bump up against in training.

I guess what I mean is that humans in the world constantly face a lot of conditions that can lead to undefined behavior as well, but 99% of the time not falling on your face is good enough to get you a job washing dishes.