Cancellability is an essential feature of implicatures. However, its reliability has been challenged by several cases and examples in which conversational implicatures seem to be hard or even impossible to cancel. Should it then be concluded that not all implicatures are cancellable, and therefore Grice's cancellability test should be weakened or abandoned? The present paper addresses this problem by drawing a distinction between theoretical and practical cancellability, where the latter concept captures the (un)reasonableness of explicit or contextual cancellation. By analyzing (...) three legal cases of misleading advertising, I show how the indefensibility of an interpretation can account for the practical uncancellability of an implicature. To explain and account for the reasonableness of an interpretation, the presumptive inferences involved must be reconstructed and evaluated considering different dimensions, such as the conversational context and the associated presumptions. (shrink)

The debate over the semantics of demonstratives is in a stalemate between those positions attributing some referential significance to a speaker's referential intentions and those not doing so. The latter approach is supported by cases driving the non-intentional intuition in which the speakers mistakenly point at objects other than the ones they intend to refer to. The intentionalists, such as Martin Montminy, reply that once we think of potential extensions of such cases in which the speaker explains to the hearer (...) what her referential intention was, it is the intentionalist intuition that prevails. In this paper, I develop a semantics for demonstratives whose task is to accommodate both of these seemingly contradictory intuitions within the general non-intentionalist framework. The proposed idea is that the reference of a use of a demonstrative can change over time, as the discourse develops. This idea is handled formally by the addition of a parameter of the index of evaluation that represents the referentially relevant aspects of the state of the discourse. Also, I provide reasons for preferring my view over two rival positions: one by Palle Leth, and one that I adjust to the demands of the semantics of demonstratives from the theory that Kai von Fintel and Anthony Gillies offer for epistemic modals, and from Laura Delgado's polyreferentialism for proper names. (shrink)