 Now consider an act of happiness-maximizing promise-breaking. It follows from (2) that is conceptually possible that the world is base-identical to the actual world, and this act is wrong, but it is also conceptually possible that the world is base-identical to the actual world, and this act is not wrong. But from (1), we can notice that it is not conceptually possible that there are two base-identical acts, one of which is wrong and one of which is not.