We citizens of the 21st century live in a world where division of epistemic labour rules. Most of what we know we learned from the spoken or written word of others, and we depend in endless practical ways on the technological fruits of the dispersed knowledge of others—of which we often know almost nothing—in virtually every moment of our lives. Interest has been growing in recent years amongst philosophers, in the issues in epistemology raised by this fact. One issue concerns (...) the depth and extent of our epistemic dependence on testimony, as we may label this broad epistemic source: Do we have any knowledge at all that is free of epistemic dependence on what we have learned from others? A related question is whether our entitlement to believe what we have learned from others can be explained without invoking any epistemic principles special to testimony. These questions concern, as it were, the macro-epistemology of testimony. In the present discussion I shall focus instead on the micro foundations. Testimony, in our broad sense, can occur through an extensive range of types of spoken and written means of purportedly factual communication, including telephone calls, e-mails and personal letters, lectures and radio broadcasts, newspapers, textbooks and encyclopaedias, personal diaries, and public records of all kinds. But the central paradigm—what started the whole communication thing off—is surely that of face-to-face spoken encounter, when one person tells something to another, thereby intending and hoping to share her knowledge with her audience. I begin by describing the speech act of telling, identifying what takes place in a felicitous act of telling. From the nature of the speech act of telling, we see precisely how it is that knowledge is, when all goes as it should, acquired from teller by trusting hearer, in such an act, and in acts of testimony more broadly. (shrink)

This paper defends reductionism about testimonial justification of beliefs against two influential arguments. One is the empirical argument to the effect that the reductionist justification of our trust in testimony is either circular since it relies on testimonial evidence or else there is scarce evidence in support of our trust in testimony. The other is the transcendental argument to the effect that trust in testimony is a prerequisite for the very existence of testimonial evidence since without the presumption of people’s (...) truthfulness we cannot interpret their utterances as testimony with propositional contents. This paper contends that the epistemic subject can interpret utterances as testimony with propositional contents without presupposing the credibility of testimony, and that evidence available to the normal epistemic subject can justify her trust in testimony. (shrink)

It is widely assumed that memory has only the capacity to preserve epistemic features that have been generated by other sources. Specifically, if S knows (justifiedly believes/rationally believes) that p via memory at T2, then it is argued that (i) S must have known (justifiedly believed/rationally believed) that p when it was originally acquired at Tl, and (ii) S must have acquired knowledge that p (justification with respect to p/rationality with respect to p) at Tl via a non-memorial source. Thus, (...) according to this view, memory cannot make an unknown proposition known, an unjustified belief justified, or an irrational belief rational--it can only preserve what is already known, justified, or rational. In this paper, I argue that condition (i) is false and, a fortiori, that condition (ii) is false. Hence, I show that, contrary to received wisdom in contemporary epistemology, memory can function as a generative epistemic source. (shrink)

We often prefer non-deferential belief to deferential belief. In the last twenty years, epistemology has seen a surge of sympathetic interest in testimony as a source of knowledge. We are urged to abandon ‘epistemic individualism’ and the ideal of the ‘autonomous knower’ in favour of ‘social epistemology’. In this connection, you might think that a preference for non-deferential belief is a manifestation of vicious individualism, egotism, or egoism. I shall call this the selfishness challenge to preferring non-deferential belief. The aim (...) of this paper is to meet the selfishness challenge by arguing that non-deferential belief is socially valuable. (shrink)

In the Nyāyasūtras (NS), the fundamental text of the Nyāya tradition, testimony is defined as a statement of a reliable speaker (āpta). According to the NS, such a speaker should possess three qualities: competence, honesty and desire to speak. The content of a discourse, including the prescriptions, is also considered reliable due to the status of a given author and the person that communicated it. -/- The Polish philosopher J.M. Bocheński similarly stresses the role of a speaker; he holds that (...) an authoritative source (whose discourse is called testimony) should be competent and truthful. The conditions of trust and superiority also apply. According to Bocheński, being an authority entails a special relation—it has a subject, object and field. Notably, Bocheński develops his own typology of testimony by distinguishing between what he calls epistemic and deontic authority. He asks questions such as: Who can be the subject of an authoritative statement? Which features should the speaker possess? How is authority recognised? Is there a universal or an absolute authority? What is the field of authority? Moreover, which qualities should the listener possess? -/- The Nyāya philosophers, both the ancient ones, like Akṣapāda Gautama, Vātsyāyana, Vācaspati Miśra, and the contemporary scholars of Nyāya, such as B. K. Matilal and J. Ganeri, were also concerned with these issues. -/- The aim of this paper is to discuss the above points in a comparative manner. I will argue that both Bocheński’s and the Nyāya accounts share very similar perspectives and encounter analogous problems. (shrink)

Review of the book Disagreement by Bryan Frances. Cambridge: Polity Press, 2014.