Sensitivity to the extra-linguistic context, as exhibited by indexical and demonstrative expressions, and sensitivity to the linguistic context, as exhibited by, for example, anaphoric uses of third person pronouns, are regularly regarded as different and independent phenomena. The data on indexicals, demonstratives, and third person pronouns, however, call for a more unified notion of context and of context sensitivity. This paper aims to develop such a unified picture by generalizing the notion of anaphora to encompass extra-linguistic context dependency and generalizing (...) the notion of a structured discourse context so that contexts contain antecedents for expressions that refer to entities in the extra-linguistic context. (shrink)

In his paper ‘Gesture Projection and Cosuppositions,’ Philippe Schlenker argues that co-verbal gestures convey not at-issue content by default and in particular, that they trigger conditional presuppositions. In this commentary, I take issue with both of these claims. Conditional presuppositions do not supply a systematic means for capturing the semantic contribution of a co-verbal gesture. Some gestures appear to contribute content inside of a negation when their associated speech content is likewise embedded; in other cases, co-verbal gestures arguably contribute unconditional (...) content to the global level. When this happens, we can infer what might look like a conditional presupposition, but this inference follows naturally from general principles already at work in purely verbal discourse and does not justify the claim that gesture content is contributed to a conditional presupposition. Problems exposed in the discussion of conditional presuppositions show that we are not yet in a position to make a general claim about the at-issue status of co-verbal gestures. (shrink)

In this paper, we show how game theoretic work on conversation combined with a theory of discourse structure provides a framework for studying interpretive bias and how bias affects the production and interpretation of linguistic content. We model the influence of author bias on the discourse content and structure of the author’s linguistic production and interpreter bias on the interpretation of ambiguous or underspecified elements of that content and structure. Interpretive bias is an essential feature of learning and understanding but (...) also something that can be exploited to pervert or subvert the truth. We develop three types of games to understand and to analyze a range of interpretive biases, the factors that contribute to them, and their strategic effects. (shrink)