Three stories about constraint end the same way: the garden withholds a fruit, the tower is scattered, and a handbook of robotics keeps a made mind inside its instructions. In all three the rule-writer stood outside and could see the whole board. This final part asks what happens when the constrained party holds the pen. Jon Elster's precommitment, Rawls's veil of ignorance, the Montreal Protocol, the test ban, the nineteen seventy-five conference on edited genes, and a decade of artificial intelligence summit declarations are put to three conditions — can the rule be seen, does breaking it cost the breaker, and did its authors know where they would stand? The verdict, the markers to watch, and the listener's answer follow.