To start off, let's make sure that we're discussing the same determinism: From Wikipedia: What it is: "Determinism is the philosophical proposition that every event, including human cognition, decision and action, is causally determined by an unbroken chain of prior occurrences. It holds that no random, spontaneous, mysterious, or miraculous events occur." And why it's important: (Finding additional reasons is left as an exercise for the reader :cup: "The principal consequence of the deterministic claim is that it poses a challenge to the existence of free will." That said, I have a pretty simple view on determinism: 1. All systems based on rules are deterministic 2. The universe is a system based on rules 3. Therefore the universe is deterministic (If nothing else you can mock me with simple number references) Nothing wrong with the logic. So let's move onto the premises: However, I hear you say, should't point 1 read: 1b. All systems based on deterministic rules are deterministic This would be a logical amendment. I simply believe that you cannot get non-deterministic rules. I also believe that the apparent non-deterministic nature of Quantum Mechanics is merely the macro result of deterministic micro processes. While I have no proof of this I do believe it to be true. It may be interesting to note that I don't like determinism and wish the universe was not deterministic but, alas, I do believe that it is.