
The Epistemic Basing Relation
The epistemic basing relation is the relation which holds between a reason and a belief if and only if the reason is a reason for which the belief is held. It is generally thought to be a necessary, but not sufficient, condition for a belief’s being justified that the belief be based on a reason. The basing relation is what distinguishes good reasons which a person possesses that contribute to the personal justification of a given belief from good reasons which the person possesses but that do not contribute to the personal justification of the belief.
Basing relations may be involved in both inferential and non-inferential justification. For example, one may hold that sensory states count as reasons, and thus require that a sensory belief be based on a reason if it is to be justified by that reason. In addition, one might understand at least some self-evident beliefs to be based on the meanings of the various terms of the sentence expressing the proposition believed. For example, one’s belief that all bachelors are unmarried men may be understood to be based on the meanings of ‘all’, ‘bachelors’, ‘are’, etc.
The basing relation is most frequently analyzed in terms of a reason’s causing a belief.[1] In such analyses, the reason and the belief are understood to be mental states of a person. The cause may be a contributing cause or a sufficient cause. However, the basing relation has also been analyzed as an appropriate counterfactual cause of a belief and also as depending on an appropriate meta-belief to the effect that a reason is a good reason to hold the belief.
Analysis of the basing relation is relevant to a variety of fundamental epistemological issues. It is relevant to the nature of epistemic rationalization and to questions regarding the internalism/externalism debate. In addition, it has been argued that reliabilist theories of justification are incompatible with the correct analysis of the basing relation.
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