 Returning to the first point about predicate-individuation, Davidson claims that “it is just the predicates which are projectible, the predicates that enter into valid inductions, that determine what counts as a change” (Davidson 1995a, 272). We know from Nelson Goodman’s ‘new riddle of induction’ (Goodman 1983) that we can invent predicates, such as ‘grue’ and ‘bleen’ (where an object is grue if it is green and examined before 2020 or otherwise blue, and an object is bleen if it is blue and examined before 2020 or otherwise green) so that a green object goes from being grue to bleen over the course of time without having changed in any intuitive sense. It will continue to be green, though it will also be true that it ceases to be grue and comes to be bleen. Contrary to much discussion of Goodman’s riddle, Davidson holds that such unusual predicates can be projectible, and figure in laws, but only when appropriately paired with other such predicates ( “All emeralds are grue” is not lawlike, but “All emerires are grue” is (where “emerire” is true of emeralds examined before 2020 or otherwise sapphires ). What is crucial for Davidson is that to understand the notion of change, which is so closely tied to the notion of causation, one must understand the notion of a projectible predicate—one appropriate for use in science—and this notion inevitably brings in the notion of law. Changes are described by predicates suitable for inclusion within laws. But how does this relate to the cause-law principle? Once again, it is unclear why Davidson would think that it is the notion of a strict law in particular that this line of argument motivates.