Presuppositions and commitment stores
Résumé
This paper revisits the classical question of presupposition projection in a dynamic approach to dialog using Hamblin's “commitment stores” (Hamblin, 1970). It is based on a view of presuppositions as selectionnal restrictions, conceived as constraints on the definition domain of functions. The specific update of commitment stores achieved by the mere use of lexical item having restricted definition domains (presuppositions) is captured by means of layered commitment stores dis-tinguishing background commitments and (classical) commitments arising from what is said. The compatibility of this dialogic approach with the dynamic theories of Heim (1983) and van der Sandt (1992) is discussed in the course of the paper.
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