A new kind of defense of the Millian theory of names is given, which explains intuitive counter-examples as depending on pragmatic effects of the relevant sentences, by direct application of Grice's and Sperber and Wilson's Relevance Theory and uncontroversial assumptions. I begin by arguing that synonyms are always intersubstitutable, despite Mates' considerations, and then apply the method to names. Then, a fairly large sample of cases concerning names are dealt with in related ways. It is argued that the method, as applied to the various cases, satisfies the criterion of success: that for every sentence in context, it is a counter-example to Millianism to the extent that it has pragmatic effects (matching speakers' intuitions).Among the first things students of the philosophy of language learn is that co-referring names cannot always be substituted salva veritate, in particular, not inside the scope of propositional attitude verbs like "believes", "knows", etc. For instance, it seems that one may believe that Hesperus is a star without believing that Phosphorus is, although Hesperus is Phosphorus.Adherents of Millianism, according to which substitutions of co-referring names are admissible in such contexts, take these intuitions to be the result of conflating certain pragmatic effects of the relevant sentences with their semantic content.Although Millianism stands or falls with the pragmatic defense, there is at present remarkably little by way of explanation of how the alleged pragmatic effects arise. Here, I 2 will try to show that the relevant sentences have certain special features in virtue of which what is saliently communicated is not their semantic contents, but pragmatically imparted propositions. Crucially, I will argue that these pragmatic effects can be shown to arise on existing pragmatic theories without any additional controversial assumptions (that may be suspected of only serving the purpose of defending Millianism). In particular, I argue, both Grice's theory and the Relevance Theory of Sperber and Wilson can be taken as they stand to entail the pragmatic effects needed. Further, many intuitions that have bothered theories of names in general, but not Millianism is particular, are also neatly explained on this pragmatic account.I first present Millianism and the conditions for a successful pragmatic defense. A pragmatic explanation is then given to the apparent failure of substitution of synonyms, which is subsequently transferred to analogous cases with names. Then, a number of other problematic cases are treated on similar lines. I end by comparing the resulting combined theory with other semantic accounts of names.
IFor reasons that will emerge as we proceed, the Millian theory is best formulated with explicit mention of the notion of semantic (as opposed to pragmatic):Any instance of the following schema semantically expresses a true proposition: "a is such that S(he/she/it) if and only if S(a)". 1