conclusive reasons

EPISTEMIC CLOSURE AND SKEPTICISM (pages 221-246)

Submitted by logos on Mon, 12/27/2010 - 22:50
paper title: 

EPISTEMIC CLOSURE AND SKEPTICISM (pages 221-246)

paper type: 
article
paper author: 

John A. BARKER, Fred ADAMS

paper author family name: 

Barker

paper abstract: 

ABSTRACT: Closure is the epistemological thesis that if S knows that P and knows that P implies Q, then if S infers that Q, S knows that Q. Fred Dretske acknowledges that closure is plausible but contends that it should be rejected because it conflicts with the plausible thesis: Conclusive reasons (CR): S knows that P only if S believes P on the basis of conclusive reasons, i.e., reasons S wouldn’t have if it weren’t the case that P. Dretske develops an analysis of knowing that centers on CR, and argues that the requirement undermines skepticism by implying the falsity of closure. We develop a Dretske-style analysis of knowing that incorporates CR, and we argue that this analysis not only accords with closure, but also implies it. In addition, we argue that the analysis accounts for the prima facie plausibility of closure-invoking skeptical arguments, and nonetheless implies that they are fallacious. If our arguments turn out to be sound, the acceptability of Dretske’s analysis of knowing will be significantly enhanced by the fact that, despite implying closure, it undermines closure-based skepticism.

paper issue: 
2

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