Two increasingly entrenched positions have evolved in the debate about the semantic role of proper names. The Millian holds that the sole semantic function of a proper name is to refer to its bearer. This view entails Substitutivity-that is, that truth-value is preserved if we intersubstitute coreferential proper names in otherwise identical sentences, even sentences that report beliefs and other propositional attitudes. Because of this the Millian is committed to the possibility that a perfectly rational subject in a traditional Frege-case might be saddled with beliefs that are, at least superficially, contradictory. Thus, Lois believes that Superman can fly and, since she believes that Clark Kent cannot fly, she thereby also believes that Superman cannot fly. Or so says the Millian. This violation of Consistency-the claim that we should attribute contradictory beliefs only to irrational agents-seems counter-intuitive at first. However, Millians have shown how this sting might be partially relieved through pragmatics: it would be misleading, although strictly speaking true, to say that Lois believes that Superman cannot fly. Alternatively (or in addition), the Millian might hold that the oddity we feel about the violation of Consistency may just be the surprise of philosophical enlightenment. It turns out that we attribute contradictory beliefs to a subject not only when she suffers some internal failure of rationality (faulty inference, insufficient attention, untidy cognitive house-keeping and so on), but also when external circumstances conspire in just the right wayas when, unbeknownst to the agent, distinct names (perhaps with distinct causal and associational histories) pick out the same individual. On this view, the attribution of contradictory beliefs is a sign that things are cognitively sub-optimal (and should be changed, other things being equal) for either internal or external reasons. It can, of course, be just as important to expose an external conspiracy (e.g., to discover that Superman is none other than Clark Kent) as it is to clear up some internal failure. The Millian's opponent holds that names play a richer semantic role, particularly in the attribution of beliefs and other propositional attitudes. In such attributions, names can be used to report on the different ways that a subject represents to herself some individual to which the names corefer. The anti-Millian is moved by a desire to honour more closely what she takes to be our actual belief-reporting practice (particularly our de
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