Presupposition and Accommodation in Update Semantics

Abstract

A reconstruction is presented of van der Sandt's theory of presupposition in the framework of update semantics and extended to belief sentences. The resulting view is confronted with earlier approaches to presupposition (especially Heim's) in update semantics, concentrating on the approach to accommodation. It is shown in some detail that the anaphoric view of presupposition can be maintained for only a subclass of presuppositional triggers and must be given up for another class. The paper shows that the treatment of presuppositional anaphora and presuppositional accommodation is compositional with respect to stacks of information states. The brief development of the approach in section 7 shows, however, that, contrary to what one would expect, an approach in terms of stacks of information states is a powerful method in the study of DRT and other dynamic systems.

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