Milica Denic (2020). "Probabilistic informativeness in implicature computation: the case of embedded disjunctions".
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Abstract: Sentences are standardly assumed to trigger scalar and ignorance implicatures because there are more informative alternative utterances the speaker could have said. Which notion of informativeness is at play here, and what knowledge is integrated into its evaluation? In this paper, a family of novel empirical observations is discussed related to inferences of embedded disjunctions, and used to argue (i) in favor of probabilistic rather than entailment-based informativeness being at play in implicature computation; and (ii) that the role of contextual knowledge in informativeness evaluation of alternative utterances is limited.
Keywords: scalar implicatures, ignorance implicatures, embedded disjunction, probabilities, informativeness, contextual knowledge.