In Jessica Brown & Mikkel Gerken (eds.), Knowledge Ascriptions. Oxford University Press. pp. 104-119 (2012)

Michael Blome-Tillmann
McGill University
In this chapter, I produce counterexamples to Presuppositional Epistemic Contextualism (PEC), a view about the semantics of ‘knowledge’-ascriptions that I have argued for elsewhere. According to PEC, the semantic content of the predicate ‘know’ at a context C is partly determined by the speakers’ pragmatic presuppositions at C. The problem for the view that I shall be concerned with here arises from the fact that pragmatic presuppositions are sometimes known to be true by the speakers who make them: hence the Problem of Known Presuppositions. After discussing several unsuccessful ways to solve the problem, I propose the addition of a new Lewisian rule of proper ignoring to the semantics of PEC--namely, the Rule of Evidence-Based Ignoring. If the proposed account succeeds, the Problem of Known Presuppositions has a straightforward solution within the framework of PEC.
Keywords epistemic contextualism  knowledge  presuppositions  context-sensitivity
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References found in this work BETA

Solving the Skeptical Problem.Keith DeRose - 1995 - Philosophical Review 104 (1):1-52.
Contextualism, Skepticism, and the Structure of Reasons.Stewart Cohen - 1999 - Philosophical Perspectives 13:57-89.
Contextualism and Knowledge Attributions.Keith Derose - 1992 - Philosophy and Phenomenological Research 52 (4):913-929.
Contextualism and Warranted Assertibility Manoeuvres.Jessica Brown - 2006 - Philosophical Studies 130 (3):407 - 435.

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Knowledge and Implicatures.Michael Blome-Tillmann - 2013 - Synthese 190 (18):4293-4319.

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