David Lewis (1941-2001) was Class of 1943 University Professor of Philosophy at Princeton University. His contributions spanned philosophical logic, philosophy of language, philosophy of mind, philosophy of science, metaphysics, and epistemology. In On the Plurality of Worlds, he defended his challenging metaphysical position, "modal realism." He was also the author of the books Convention, Counterfactuals, Parts of Classes, and several volumes of collected papers.

Evidentialism is the thesis that epistemic justification for belief supervenes on evidential support. However, we claim there are cases in which, even though two subjects have the same evidential support for a proposition, only one of them is justified. What make the difference are pragmatic factors, factors having to do with our cares and concerns. Our argument against evidentialism is not based on intuitions about particular cases. Rather, we aim to provide a theoretical basis for rejecting evidentialism by defending a (...) “pragmatic” necessary condition on epistemic justification. We argue for the following necessary condition for justification: S is justified in believing that p only if S is rational to prefer (and, hence, act) as if p. In light of this necessary condition, the price of evidentialism is skepticism, or something close to it. (shrink)

According to a prominent claim in recent epistemology, people are less likely to ascribe knowledge to a high stakes subject for whom the practical consequences of error are severe, than to a low stakes subject for whom the practical consequences of error are slight. We offer an opinionated "state of the art" on experimental research about the role of stakes in knowledge judgments. We draw on a first wave of empirical studies--due to Feltz & Zarpentine (2010), May et al (2010), (...) and Buckwalter (2010)--which cast doubt on folk stakes sensitivity, and a second wave of empirical studies--due to Pinillos (2012) and Sripada & Stanley (2012)--said to vindicate it, as well as new studies of our own. We conclude that the balance of evidence to date best supports Folk stakes insensitivity, or that all else equal, stakes do not affect knowledge ascription. (shrink)

One recent trend in contemporary epistemology is to study the way in which the concept of knowledge is actually applied in everyday settings. This approach has inspired an exciting new spirit of collaboration between experimental philosophers and traditional epistemologists, who have begun using the techniques of the social sciences to investigate the factors that influence ordinary judgments about knowledge attribution. This paper provides an overview of some of the results these researchers have uncovered, suggesting that in addition to traditionally considered (...) factors like evidence and justification, a number of important non-truth-conducive factors play significant roles in determining when people ascribe knowledge. The present review focuses on four non-traditional factors: pragmatic load (in relation to contextualism and interest-relative invariantism), moral judgment, performance errors, and demographic variation. (shrink)

A number of researchers have begun to demonstrate that the widely discussed ?Knobe effect? (wherein participants are more likely to think that actions with bad side-effects are brought about intentionally than actions with good or neutral side-effects) can be found in theory of mind judgments that do not involve the concept of intentional action. In this article we report experimental results that show that attributions of knowledge can be influenced by the kinds of (non-epistemic) concerns that drive the Knobe effect. (...) Our findings suggest there is good reason to think that the epistemic version of the Knobe effect is a theoretically significant and robust effect, and that the goodness or badness of side-effects can often have greater influence on participant knowledge attributions than explicit information about objective probabilities. Thus, our work sheds light on important ways in which participant assessments of actions can affect the epistemic assessments participants make of agents? beliefs. (shrink)

I will ask the conditional question: if folk attributions of "know" are not sensitive to the stakes and/or the salience of error, does this cast doubt on contextualism or subject-sensitive invariantism (SSI)? I argue that if it should turn out that folk attributions of knowledge are insensitive to such factors, then this undermines contextualism, but not SSI. That is not to say that SSI is invulnerable to empirical work of any kind. Rather, I defend the more modest claim that leading (...) versions of SSI are not undermined by one particular kind of experimental result, namely the recent suggestion that knowledge attributions are insensitive to the stakes. (shrink)

Suppose that Ann says, “Keith knows that the bank will be open tomorrow.” Her audience may well agree. Her knowledge ascription may seem true. But now suppose that Ben—in a different context—also says “Keith knows that the bank will be open tomorrow.” His audience may well disagree. His knowledge ascription may seem false. Indeed, a number of philosophers have claimed that people’s intuitions about knowledge ascriptions are context sensitive, in the sense that the very same knowledge ascription can seem true (...) in one conversational context but false in another. This purported fact about people’s intuitions serves as one of the main pieces of evidence for epistemic contextualism. (shrink)

In this paper I survey some recent developments in experimental philosophy and discuss their bearing on two leading theories in epistemology: Contextualism and Interest Relative Invariantism. In the first part of the paper, I survey some general issues of how experimental philosophy may be relevant to assessing contextualism and IRI. In the second part, I discuss and critique some of the recent experimental work.

I will here sharply oppose all the phases of the story Schaffer & Knobe tell. In Part 1 we will look at the supposed empirical case against standard contextualism, and in Part 2 we will investigate Schaffer & Knobe’s supposed empirical case for the superiority of contrastivism over standard contextualism.

According to intellectualism, what a person knows is solely a function of the evidential features of the person's situation. Anti-intellectualism is the view that what a person knows is more than simply a function of the evidential features of the person's situation. Jason Stanley (2005) argues that, in addition to “traditional factors,” our ordinary practice of knowledge ascription is sensitive to the practical facts of a subject's situation. In this paper, we investigate this question empirically. Our results indicate that Stanley's (...) assumptions about knowledge ascriptions do not reflect our ordinary practices in some paradigmatic cases. If our data generalize, then arguments for anti-intellectualism that rely on ordinary knowledge ascriptions fail: the case for anti-intellectualism cannot depend on our ordinary practices of knowledge ascription. (shrink)

Introduction -- Fallibilism -- Contextualism -- Knowledge and reasons -- Justification -- Belief -- The value and importance of knowledge -- Infallibilism or pragmatic encroachment? -- Appendix I: Conflicts with bayesian decision theory? -- Appendix II: Does KJ entail infallibilism?

In defending his interest-relative account of knowledge in Knowledge and Practical Interests (2005), Jason Stanley relies heavily on intuitions about several bank cases. We experimentally test the empirical claims that Stanley seems to make concerning our common-sense intuitions about these bank cases. Additionally, we test the empirical claims that Jonathan Schaffer seems to make in his critique of Stanley. We argue that our data impugn what both Stanley and Schaffer claim our intuitions about such cases are. To account for these (...) results, one must develop a better conception of the connection between a subject's interests and her body of knowledge than those offered by Stanley and Schaffer. (shrink)

Does what you know depend on what is at stake for you? That is, is the knowledge relation sensitive to the subject’s practical interests? Subject sensitive invariantists (Fantl and McGrath, 2002; Hawthorne, 2004, ch. 4; Stanley, forthcoming) say that the answer is yes. They claim to capture the contextualist data without the shifty semantics. I will argue that the answer is no. The knowledge relation is sensitive to what is in question for the attributor, rather than what is at stake (...) for the subject. There is no substitute for the contextualist semantics. (shrink)

Knobe (2003a, 2003b, 2004b) and others have demonstrated the surprising fact that the valence of a side-effect action can affect intuitions about whether that action was performed intentionally. Here we report the results of an experiment that extends these findings by testing for an analogous effect regarding knowledge attributions. Our results suggest that subjects are less likely to find that an agent knows an action will bring about a side-effect when the effect is good than when it is bad. It (...) is further argued that these findings, while preliminary, have important implications for recent debates within epistemology about the relationship between knowledge and action. (shrink)

Recent theories of epistemic contextualism have challenged traditional invariantist positions in epistemology by claiming that the truth conditions of knowledge attributions fluctuate between conversational contexts. Contextualists often garner support for this view by appealing to folk intuitions regarding ordinary knowledge practices. Proposed is an experiment designed to test the descriptive conditions upon which these types of contextualist defenses rely. In the cases tested, the folk pattern of knowledge attribution runs contrary to what contextualism predicts. While preliminary, these data inspire prima (...) facie skepticism for the contextualist hypothesis regarding folk knowledge claims, as well as challenge certain predictions made by recent theories of subject-sensitive invariantism. It is further argued that such results raise methodological questions concerning the practice of relying on an assumption of intuitions, with respect to ordinary language practices, as evidence for philosophical conclusions regarding knowledge. (shrink)

In epistemology, “contextualism” denotes a wide variety of more-or-less closely related positions according to which the issues of knowledge or justification are somehow relative to context. I will proceed by first explicating the position I call contextualism, and distinguishing that position from some closely related positions in epistemology, some of which sometimes also go by the name of “contextualism”. I’ll then present and answer what seems to many the most pressing of the objections to contextualism as I construe it, and (...) also indicate some of the main positive motivations for accepting the view. Among the epistemologists I’ve spoken with who have an opinion on the matter, I think it’s fair to say a majority reject contextualism. However, the resistance has to this point been largely underground, with little by way of sustained arguments against contextualism appearing in the journals,[i] though I have begun to see various papers in manuscript form which are critical of contextualism. Here, I’ll respond the criticism of contextualism that, in my travels, I have found to be the most pervasive in producing suspicion about the view. (shrink)

I present the features of the ordinary use of 'knows' that make a compelling case for the contextualist account of that verb, and I outline and defend the methodology that takes us from the data to a contextualist conclusion. Along the way, the superiority of contextualism over subject-sensitive invariantism is defended, and, in the final section, I answer some objections to contextualism.

According to Interest-Relative Invariantism, whether an agent knows that p, or possesses other sorts of epistemic properties or relations, is in part determined by the practical costs of being wrong about p. Recent studies in experimental philosophy have tested the claims of IRI. After critically discussing prior studies, we present the results of our own experiments that provide strong support for IRI. We discuss our results in light of complementary findings by other theorists, and address the challenge posed by a (...) leading intellectualist alternative to our view.Send article to KindleTo send this article to your Kindle, first ensure [email protected] is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about sending to your Kindle. Find out more about sending to your Kindle. Note you can select to send to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be sent to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply. Find out more about the Kindle Personal Document Service.EMPIRICAL TESTS OF INTEREST-RELATIVE INVARIANTISMVolume 9, Issue 1Chandra Sekhar Sripada and Jason StanleyDOI: https://doi.org/10.1017/epi.2011.2Your Kindle email address Please provide your Kindle [email protected]@kindle.com Available formats PDF Please select a format to send. By using this service, you agree that you will only keep articles for personal use, and will not openly distribute them via Dropbox, Google Drive or other file sharing services. Please confirm that you accept the terms of use. Cancel Send ×Send article to Dropbox To send this article to your Dropbox account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about sending content to Dropbox. EMPIRICAL TESTS OF INTEREST-RELATIVE INVARIANTISMVolume 9, Issue 1Chandra Sekhar Sripada and Jason StanleyDOI: https://doi.org/10.1017/epi.2011.2Available formats PDF Please select a format to send. By using this service, you agree that you will only keep articles for personal use, and will not openly distribute them via Dropbox, Google Drive or other file sharing services. Please confirm that you accept the terms of use. Cancel Send ×Send article to Google Drive To send this article to your Google Drive account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about sending content to Google Drive. EMPIRICAL TESTS OF INTEREST-RELATIVE INVARIANTISMVolume 9, Issue 1Chandra Sekhar Sripada and Jason StanleyDOI: https://doi.org/10.1017/epi.2011.2Available formats PDF Please select a format to send. By using this service, you agree that you will only keep articles for personal use, and will not openly distribute them via Dropbox, Google Drive or other file sharing services. Please confirm that you accept the terms of use. Cancel Send ×Export citation Request permission. (shrink)

Previous research in experimental philosophy has suggested that moral judgments can influence the ordinary application of a number of different concepts, including attributions of knowledge. But should epistemologists care? The present set of studies demonstrate that this basic effect can be extended to overturn intuitions in some of the most theoretically central experiments in contemporary epistemology: Gettier cases. Furthermore, experiment three shows that this effect is unlikely mediated by a simple desire to blame, suggesting that a correct psychological account of (...) ordinary knowledge attribution may include moral judgment. (shrink)