This dissertation argues for a metaethical theory I call "Expressive-Assertivism." Expressive-Assertivism is a distinctive, substantial refinement of dual-use metaethical theories traditionally associated with R. M. Hare, C. L. Stevenson, and, more recently, with David Copp. If true, Expressive-Assertivism clarifies, resolves, or dissolves---without, in turn, raising additional difficulties---a number of philosophical problems, including what Michael Smith calls "The Moral Problem," which many consider to be the central organizing problem in contemporary metaethics. The following are the three most important features of Expressive-Assertivism. (...) ;1. The central tenet. The proper, literal use of an ethical sentence, such as 'Donating to charity is right', is the performance of a direct expressive illocutionary act and a direct assertive illocutionary act. Recognizing that ethical sentences can be used to both directly express a speaker's attitude and directly assert something about the world captures what is intuitively compelling about "expressivist" theories---namely, that there is some strong connection between a speaker's sincere moral utterance and his or her motivations to act---and what is intuitively compelling about "descriptivist" theories---namely, that moral utterances appear to have descriptive or cognitive content and, therefore, are truth-evaluable. The Central Tenet is the feature of Expressive-Assertivism that dissolves The Moral Problem. ;2. The generality principle. The proper, literal use of an ethical sentence directly expresses an attitude, not toward the subject of the sentence, but toward things of a more general kind, namely, things that have the property picked out by the ethical predicate . ;3. The extensionality principle. A speaker directly expresses an attitude toward things that have the property picked out by an ethical predicate whenever that predicate appears in any extensional context. Together, the Extensionality and Generality Principles shield Expressive-Assertivism from many objections to traditional expressivist theories, including "The Embedding Objection," which many consider to be the most difficult problem faced by expressivists. (shrink)
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