 The problem is that the fair equality of opportunity principle is too general and indeterminate to address a family of “unsolved rationing problems” (Daniels 1993). For example, when we are thinking of investing in a new service or technology, we may agree that we should give those who are worst off in their health some priority over those who are better off. But we may wonder how much priority we should give them if we can produce much bigger improvement in health for those who are somewhat better off. Similarly, we may agree not to allow many trivial benefits to outweigh significant ones, but we may still disagree about when do modest benefits for larger numbers of people outweigh significant benefits for fewer people. In these and other problems, reasonable people—people seeking reasons that can form the basis for a mutual justification of policy—will disagree about how to make the tradeoffs among the competing values at issue, even if they agree that the overall goal of health policy should be to protect opportunity. We lack prior agreement on more fine-grained principles that tell us how best to protect opportunity in this context. Because we lack a consensus on such principles, we should engage a form of procedural justice or fair process to yield fair outcomes.