This paper presents two studies on the development and validation of a ten-item scale of epistemic vice and the relationship between epistemic vice and misinformation and fake news. Epistemic vices have been defined as character traits that interfere with acquiring, maintaining, and transmitting knowledge. Examples of epistemic vice are gullibility and indifference to knowledge. It has been hypothesized that epistemically vicious people are especially susceptible to misinformation and conspiracy theories. We conducted one exploratory and one confirmatory observational survey study on (...) Amazon Mechanical Turk among people living in the United States (total _N_ = 1737). We show that two psychological traits underlie the range of epistemic vices that we investigated: indifference to truth and rigidity. Indifference manifests itself in a lack of motivation to find the truth. Rigidity manifests itself in being insensitive to evidence. We develop a scale to measure epistemic vice with the subscales indifference and rigidity. The Epistemic Vice Scale is internally consistent; has good convergent, divergent, and discriminant validity; and is strongly associated with the endorsement of misinformation and conspiracy theories. Epistemic vice explains additional variance in the endorsement of misinformation and conspiracy theories over and above demographic and related psychological concepts and shows medium to large effect sizes across outcome measures. We demonstrate that epistemic vice differs from existing psychological constructs, and show that the scale can explain individual differences in dealing with misinformation and conspiracy theories. We conclude that epistemic vice might contribute to “postfactive” ways of thinking. (shrink)

In recent literature, several authors attempt to naturalize epistemic normativity by employing an etiological account of functions. The thought is that epistemic entitlement consists in the normal functioning of our belief-acquisition systems, where the latter acquire the function to reliably deliver true beliefs through a history of biological benefit.

The cases of Norman the Clairvoyant and Mr. Truetemp form classic counterexamples to the process reliabilist's claim that reliability is sufficient for prima facie justification. I discuss several ways in which contemporary reliabilists have tried to deal with these counterexamples, and argue that they are all unsuccessful. Instead, I propose that the most promising route lies with an appeal to a specific kind of higher-order defeat that is best cashed out in terms of properly functioning monitoring mechanisms.

According to Greco’s early explanatory salience contextualism, _S_ knows that _p_ if and only if _S_’s cognitive abilities are the salient factor in a causal explanation of why _S_ holds a true belief rather than a false belief or no belief at all. Greco abandoned this view because it cannot handle fake barn cases and because it proves impossible to analyze knowledge in terms of a quantitative characterization of explanatory salience. The paper argues that the core idea of explanatory salience (...) contextualism could have been saved if only the causal notion of explanation had been replaced by an abductive notion. (shrink)