 Competing philosophical analyses of laws of nature render different verdicts on the possibility of cosmological laws. Cosmological laws, if possible, differ from local physical laws in a variety of ways—they do not apply to subsystems of the universe, they lack multiple instances, and etc. Philosophical accounts of laws take different features to be essential to law-hood. For example, the influential Mill-Ramsey-Lewis account takes the laws to be axioms of the deductive system capturing some body of physical knowledge that optimally balances strength (the scope of derived claims) and simplicity (the number of axioms) (see, e.g., Loewer 1996). It is quite plausible that a constraint on the initial state, such as Penrose’s Weyl curvature hypothesis, would count as a law on this account. By contrast, accounts that take other features, such as governing evolution, as essential, reach the opposite verdict.