Online research in philosophy

This paper reports on an approach to model generalized implicatures using nonmonotonic logics. The approach, called compositional, is based on the idea of compositional semantics, where the implicatures carried by a sentence are constructed from the implicatures carried by its constituents, but it also includes some aspects nonmonotonic logics in order to model the defeasibility of generalized implicatures.

Paul Grice warned that ‘the nature of conventional implicature needs to be examined before any free use of it, for explanatory purposes, can be indulged in’ (1978/1989: 46). Christopher Potts heeds this warning, brilliantly and boldly. Starting with a definition drawn from Grice’s few brief remarks on the subject, he distinguishes conventional implicature from other phenomena with which it might be confused, identifies a variety of common but little-studied kinds of expressions that give rise to it, and develops a formal, multidimensional semantic framework for systematically capturing its distinctive character. The book is a virtuosic blend of astute descriptive observations and technically sophisticated formulations. Fortunately for the technically unsophisticated reader, the descriptive observations can be appreciated on their own.

I argue that conventional implicatures embed in logical compounds, and are non-truth-conditional contributors to sentence meaning. This, I argue has significant implications for how we understand truth, truth-conditional content, and truth-bearers.

Moral assertions express attitudes, but it is unclear how. This paper examines proposals by David Copp, Stephen Barker, and myself that moral attitudes are expressed as implicature (Grice), and Copp's and Barker's claim that this supports expressivism about moral speech acts. I reject this claim on the ground that implicatures of attitude are more plausibly conversational than conventional. I argue that Copp's and my own relational theory of moral assertions is superior to the indexical theory offered by Barker and Jamie Dreier, and that since the relational theory supports conversational implicatures of attitude, expressive conventions would be redundant. Furthermore, moral expressions of attitude behave like conversational and not conventional implicatures, and there are reasons for doubting that conventions of the suggested kind could exist.

This article presents evidence that individual words and phrases can contribute multiple independent pieces of meaning simultaneously. Such multidimensionality is a unifying theme of the literature on conventional implicatures and expressives. I use phenomena from discourse, semantic composition, and morphosyntax to detect and explore various dimensions of meaning. I also argue that, while the meanings involved are semantically independent, they interact pragmatically to reduce underspecification and fuel pragmatic enrichment. In this article, the central case studies are appositives like Falk, the CEO, and the taboo intensive damn, though discourse particles and connectives like but, even, and still play supporting roles. The primary evidence, both quantitative and qualitative, is drawn from large interview and product-review corpora, which harbor a wealth of information about the importance of these items to discourse.

1. Sentences have implicatures. (11, 14, 19)** 2. Implicatures are inferences. (12. 14) 3. Implicatures can’t be entailments. 4. Gricean maxims apply only to implicatures. (16, 17) 5. For what is implicated to be figured out, what is said must be determined first. (12, 13) 6. All pragmatic implications are implicatures. 7. Implicatures are not part of the truth-conditional contents of utterances. (20) 8. If something is meant but unsaid, it must be implicated. (20) 9. Scalar “implicatures” are implicatures. (11) 10. Conventional “implicatures” are implicatures.

We define a notion of projective meaning which encompasses both classical presuppositions and phenomena which are usually regarded as non-presuppositional but which also display projection behavior—Horn’s assertorically inert entailments, conventional implicatures (both Grice’s and Potts’) and some conversational implicatures. We argue that the central feature of all projective meanings is that they are not-at-issue, defined as a relation to the question under discussion. Other properties differentiate various sub-classes of projective meanings, one of them the class of presuppositions according to Stalnaker. This principled taxonomy predicts differences in behavior unexpected on other models among the various conventional triggers and conversational implicatures, while holding promise for a general, explanatory account of projection which applies to all the types of meanings considered.

The history of conventional implicatures is rocky, their current status uncertain. So it seems wise to return to their source and start afresh, with an open-minded reading of the original definition (Grice 1975) and an eye open for novel factual support. Suppose the textbook examples (therefore, even, but and its synonyms) disappeared. Where would conventional implicatures be then? This book’s primary descriptive claim is that they would still enjoy widespread factual support. I match this with a theoretical proposal: if we move just a few years forward from the genesis of CIs, we find in Karttunen and Peters’ (1979) multidimensional semantics the basis for an ideal description logic.