The Model of a True Demonstrative: Extra-linguistic Effects on Situated Meaning
This chapter introduces the standard account of context-sensitivity, focusing on true demonstratives, the model for most context-sensitive expressions. The account involves an idealization that utterances are interpreted in a single, unchanging context. But this is problematic: it has a consequence that demonstratives are either indefinitely lexically ambiguous, or indefinitely ambiguous at the level of logical form. The chapter argues this is theoretically problematic. Relaxing this idealization, we could let the context change between occurrences of demonstratives. A demonstrative could then have an unambiguous meaning, selecting the prominent interpretation in the current context. However, if prominence is determined extra-linguistically, as the traditional model assumes, we would still lack a systematic account of context-change, facing much of the same problems. An alternative account is outlined, which the chapter argues avoids the problems: the context is shifty, but the mechanisms of context-change are linguistic, and so the content of demonstratives is fully linguistically determined.