The universe appears chaotic, in that outcomes have sensitive dependence on its initial conditions. Even if all laws of physics are deterministic. So for there

The universe appears chaotic, in that outcomes have sensitive dependence on its initial conditions. Even if all laws of physics are deterministic. So for there to be a wide range of possible things happening from the initial starting point (including you and I having this conversation right now), IMO it follows that a complete description of the initial conditions would have to be absurdly (infinitely?) large to cause the universe to replay to this exact moment if you started it all over again. In other words, the size of X would have to be extremely large… so I think I agree with you. (Edited once I realized that myself and OP are likely in agreement.)