Conversational implicatures via general pragmatic pressures

  • Authors:
  • Christopher Potts

  • Affiliations:
  • UMass Amherst, Amherst, MA

  • Venue:
  • JSAI'06 Proceedings of the 20th annual conference on New frontiers in artificial intelligence
  • Year:
  • 2006

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Abstract

This paper aims to show how general pragmatic pressures, interacting with the context of utterance, can produce specific conversational implicatures -- as well as the lack thereof in nonsupporting environments. Inspired by the work of Merin (1997), Blutner (1998), van Rooy (2003a), Benz et al. (2005), and others, I use probabilities to represent speakers' belief states and the content of their utterances. These values determine an utterance's quality rating and quantity rating. I adapt Roberts' (1996) view of the question under discussion to define a relevance ranking of utterances. These values come together in a definition of felicitous utterance. This definition licenses certain inferences -- relevance implicatures relating to the question under discussion (section 4.1) and a variety of quantity implicatures (sections 4.2-4.3).