Two linguistic models of the context-sensitivity of ‘know’

This article aims to assess the validity of two linguistic models of the context-sensitivity of the term ?know?: (I) indexical model, according to which knowledge ascriptions are context-sensitive due to an unstable Kaplanian character of the term ?know?, and (II) hidden-indexical model, that explains context sensitivity of ?know? by referring to its semantic similarities with gradable adjectives. This article is structured as follows. Section 1 briefly reviews contextualism as an epistemic position and introduces key features of both models. Section 2 establishes criteria for their evaluation: (A) their compatibility with our common linguistic practices, and (B) their compatibility with a contextualist solution to the problem of philosophical skepticism. Sections 3 and 4 examine two of the most prominent objections that aim to prove that each of these models fails to meet one or both of the aforementioned criteria. The article concludes that the hidden-indexical model, supplemented by Bloom-Tillman?s Modifiability Constraint, provides the more adequate linguistic support for the thesis of epistemic contextualism.