True. Causation is less useful for fundamental physics than it is for the other sciences. The intent of my comment is that even if causation is nonsensical at t

True. Causation is less useful for fundamental physics than it is for the other sciences. The intent of my comment is that even if causation is nonsensical at the physical level, it may be usefully and sensibly defined at higher other levels. Just like how "true" randomness isn't a prerequisite for usefully defining probability.