The troubling word "appropriate" appears twice in this section, raising difficult questions. How does a decision maker know that a decision rule is reasonable, that is, appropriate to its context? also, how does an analysis know that the logical and empirical standards applied are rational, that is, appropriate to the decision rule and its context? The answer to both questions is that appropriateness is socially determined. Both decision makers and analysis thus must communicate with other-the population at large as well as a range of experts-to confirm that they have acted appropriately.