lect19-pragmatics - Intro Questions Implicatures Decision...

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Unformatted text preview: Intro Questions Implicatures Decision theory Conclusion The pragmatics of questions and answers, Part 2: Partition semantics and decision-theoretic pragmatics Christopher Potts UMass Amherst Linguistics CMPSCI 585, December 4, 2007 Intro Questions Implicatures Decision theory Conclusion What kind of answer is that? (A cautionary tale) Example (After Solan and Tiersma 2005:220) A I lost my wallet. Do you know where it is? B I saw it on the kitchen table earlier. Intro Questions Implicatures Decision theory Conclusion What kind of answer is that? (A cautionary tale) Example (After Solan and Tiersma 2005:220) Context : B has pocketed A ’s wallet. A I lost my wallet. Do you know where it is? B I saw it on the kitchen table earlier. Intro Questions Implicatures Decision theory Conclusion What kind of answer is that? (A cautionary tale) Example (After Solan and Tiersma 2005:220) Context : B has pocketed A ’s wallet. A I lost my wallet. Do you know where it is? B I saw it on the kitchen table earlier. Observations • B ’s answer is superficially partial . • But contextual factors might lead A to believe that B in fact over answered . (Enrichment: “ No, but . . . ” ) Intro Questions Implicatures Decision theory Conclusion What kind of answer is that? (A cautionary tale) Example (After Solan and Tiersma 2005:220) Context : B has pocketed A ’s wallet. A I lost my wallet. Do you know where it is? B I saw it on the kitchen table earlier. Observations • B ’s answer is superficially partial . • But contextual factors might lead A to believe that B in fact over answered . (Enrichment: “ No, but . . . ” ) What pragmatic facts has B leveraged into a devious answer? Intro Questions Implicatures Decision theory Conclusion This lecture 1 We’ll explore the partition semantics for questions, using it to define some initial pragmatic principles. 2 We’ll develop a decision-theoretic perspective on the partition semantics and its pragmatics, with the goal of developing a more general treatment based in information theory. Intro Questions Implicatures Decision theory Conclusion Question semantics Groenendijk and Stokhof (1982) Interrogative denotations partition the information state into equivalence classes based on the extension of the question predicate. Intro Questions Implicatures Decision theory Conclusion Question semantics Groenendijk and Stokhof (1982) Interrogative denotations partition the information state into equivalence classes based on the extension of the question predicate. Answering • Fully congruent answers identify a single cell. • Partial answers overlap with more than one cell. • Over-answers identify a proper subset of one of the cells. Intro Questions Implicatures Decision theory Conclusion Polar questions [[ Did Sam laugh? ]] = braceleftBig { v ∈ W | v ∈ [[ laugh ( sam )]] iff w ∈ [[ laugh ( sam )]] } vextendsingle vextendsingle vextendsingle w ∈ W bracerightBig [[ laughed ( sam )]] W − [[ laughed ( sam )]] Intro...
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This note was uploaded on 02/22/2012 for the course CMPSCI 585 taught by Professor Staff during the Fall '08 term at UMass (Amherst).

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lect19-pragmatics - Intro Questions Implicatures Decision...

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