How Partisanship Can Moderate the Influence of Communicated Information on the Beliefs of Agents Aiming to Form True Beliefs

Partisan epistemology – individuals granting greater credibility to co-partisan sources in evaluating information – is often taken to be evidence of directionally motivated reasoning in which concerns about group membership override concerns about accuracy. Against this dominant view, I outline a novel accuracy-based account of this mode of reasoning. According to this account, partisan epistemology stems from the inference that co-partisans are more likely to be right as they have superior epistemic access to the relevant facts and seek to realize the correct values. I argue that this theory fits better with relevant findings than motivated-reasoning theories of partisan epistemology. Finally, I suggest it has adequate explanatory power vis-à-vis patterns of misinformation belief.