Abstract
The ProblemSome: controversies have a staying power because they spring from unavoidable moral and conceptual puzzles. The debates concerning transplantation are a good example. To begin with, they are not a single controversy. Rather, they are examples of the scientific debates with heavy political and ethical overlays that characterize a large area of public-policy discussions.1 The determination of whether or not heart or liver transplantation is an experimental or noncxperimental procedure for which it is reasonable and necessary to provide reimbursement is not simply a determination on the basis of facts regarding survival rates or the frequency with which . . .

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