“The distinction that’s new, and that we didn’t used to make, is that something can be deterministic but not predictable.
We tend to think they are synonyms but they’re not.
Something can be obeying some law of nature but it’s not predictable because what it’s doing is so complicated that the time it would take you to calculate what it was going to do would take longer than the thing actually doing it.
So you could compute it but you can’t compute the world any faster than it is happening.”
Rudy Rucker, in interview, 2007