This counterexample is instructive, however, since there are two ways of amending the proposal in the light of it. First, perhaps the principle of nondistinct sustaining causes fails to capture our intuitions about causes of disease. A second possibility is that the principle is a good causal condition, but that the account of evils is too broad, and needs to be restricted to a more intuitively medical set of evils, rather than the broader class of impediments to well-being. The section on healt