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Belief, Credence, and Pragmatic Encroachment 1

2012, Philosophy and Phenomenological Research

Abstract

This paper compares two alternative explanations of pragmatic encroachment on knowledge (i.e., the claim that whether an agent knows that p can depend on pragmatic factors). After reviewing the evidence for such pragmatic encroachment, we ask how it is best explained, assuming it obtains. Several authors have recently argued that the best explanation is provided by a particular account of belief, which we call pragmatic credal reductivism. On this view, what it is for an agent to believe a proposition is for her credence in this proposition to be above a certain threshold, a threshold that varies depending on pragmatic factors. We show that while this account of belief can provide an elegant explanation of pragmatic encroachment on knowledge, it is not alone in doing so, for an alternative account of belief, which we call the reasoning disposition account, can do so as well. And the latter account, we argue, is far more plausible than pragmatic credal reductivism, since it accords far better with a number of claims about belief that are very hard to deny. Recently, a quandary has arisen in the literature on pragmatic encroachment. On the one hand, it has been forcefully argued that there is pragmatic encroachment on knowledge, or in other words that whether an agent knows that p can depend on pragmatic factors such as the costs of acting as if it were true that p when it is not true. And it has been argued that the best way to explain pragmatic encroachment on knowledge is by assuming that pragmatic factors affect justified belief. On the other hand, it is widely held that there is no pragmatic encroachment on justified degrees of belief, or levels of confidence, as the latter, it is maintained, should be strictly apportioned to the evidence. 2 But this creates a problem. How can pragmatic factors affect whether we are justified in believing a proposition (as opposed to disbelieving it or withholding judgment concerning it) without affecting the degree of belief or level of confidence that we are justified in