Implicature and non-local pragmatic encroachment

This paper offers a novel conversational implicature account of the pragmatic sensitivity of knowledge attributions. Developing an account I first suggested elsewhere (Locke, Inquiry 57:28-54, 2014b) and independently proposed by Lutz (in Synthese 191:1717-1740, 2014), this paper explores the idea that the relevant implicatures are generated by a constitutive relationship between believing a proposition and a disposition to treat that proposition as true in practical deliberation. I argue that while this view has a certain advantage over standard implicature accounts of pragmatic sensitivity, it comes with a significant concession to proponents of pragmatic encroachment. On the account offered here, knowledge attributions have locally-pragmatically-sensitive implicatures because they have non-locally-pragmatically-sensitive entailments. The view thus represents a unique and powerful hybrid of these two approaches to the pragmatic sensitivity of knowledge attributions.