John Turri

According to the non-factive hypothesis, espoused by contemporary epistemologists, our ordinary practice of evaluating belief is insensitive to the truth. In other words, on the ordinary view, there is no evaluative connection between what someone should believe and whether their belief would be true. Contrary to that, the factive hypothesis holds that our ordinary practice of evaluating belief is sensitive to the truth. Results from recent behavioral studies strongly support the factive hypothesis, but this evidence was recently subjected to three new objections (Weissglass in Synthese, 2020. https://doi.org/10.1007/s11229-020-02584-5). This paper summarizes and responds to these objections.

Knowledge sets the standard for appropriate assertion and recent evidence suggests that it might also set the standard for appropriate belief and decision‐making. Governments spend hundreds of millions of dollars to support the creation, transfer, and mobilization of knowledge. Philosophers have created a dizzying array of Gettier case thought experiments. In doing so, many have been guilty of experimenter bias. This includes some original players who helped set the agenda for decades to come. Cognitive scientists recently began seriously investigating knowledge judgments. The study of Gettier cases was motivated by work in psychology showing important cultural differences in reasoning styles and moral judgments. The nominal category Gettier case includes a variety of cases with radical structural differences that are extremely important in both theory and ordinary practice, so important as to render the nominal category, as the authors have inherited it, utterly useless.

This entry introduces many of the most important results of the contemporary Virtue epistemology (hereafter 'VE') research program. These include novel attempts to resolve longstanding disputes, solve perennial problems, grapple with novel challenges, and expand epistemology’s horizons. In the process, it reveals the diversity within VE. Beyond sharing the two unifying commitments mentioned above, its practitioners diverge over the nature of intellectual virtues, which questions to ask, and which methods to use.

From antiquity through the twentieth century, philosophers have hypothesized that, intuitively, it is harder to know negations than to know affirmations. This paper provides direct evidence for that hypothesis. In a series of studies, I found that people naturally view negations as harder to know than affirmations. Participants read simple scenarios and made judgments about truth, probability, belief, and knowledge. Participants were more likely to attribute knowledge of an outcome when framed affirmatively than when framed negatively. Participants did this even though the affirmative and negative framings were logically equivalent. The asymmetry was unique to knowledge attributions: it did not occur when participants rated truth, probability, or belief. These findings show new consequences of negation on people’s judgments and reasoning and can inform philosophical theorizing about the ordinary concept of knowledge.

Virtue epistemology is by now a broad and varied field. Also by now, there are various helpful overviews of the field available, some of which are included in this volume (see especially Battaly 2008 and Baehr 2008).1 This introduction will not provide another. Rather, we will begin with a brief characterization of what virtue epistemology is (Section 1), and then briefly describe some of the topics that are treated in this volume (Section 2). Some of these are topics that have occupied epistemologist in general, while others are raised by virtue epistemology in particular. We end with a summary of the selections that have been collected here (Section 3).

The value of knowledge has always been a central topic within epistemology. Going all the way back to Plato’s Meno, philosophers have asked, why is knowledge more valuable than mere true belief? Interest in this question has grown in recent years, with theorists proposing a range of answers. But some reject the premise of the question and claim that the value of knowledge is ‘swamped’ by the value of true belief. And others argue that statuses other than knowledge, such as justification or understanding, are distinctively valuable. We will call the general question of why knowledge is valuable the value problem.