what exactly is it to take someone's word for something? What is it to treat another as an authority concerning what to believe, and what is it to then trust this person for the truth? In Testimony, Trust, and Authority, Benjamin McMyler argues that philosophers have failed to appreciate the nature and significance of our epistemic dependence on the word of others. What others tell us is the case-their testimony, as philosophers use the term-provides us with a reason for belief that is fundamentally unlike the kind of reason for belief provided by other kinds of impersonal evidence. Unlike a footprint in the snow or a bloody knife left at the scene of a crime, a speaker's testimony provides an audience with what McMyler calls a second-personal reason for belief, a reason for belief that serves to parcel out epistemic responsibility for the belief interpersonally between speaker and audience. Testimony, Trust, and Authority is the most developed articulation and defense of an interpersonal theory of the epistemology of testimony yet to appear. It explains how this position relates to the historical development of philosophical questions about testimony, draws out what is at stake between this position and other competing positions in the contemporary epistemological literature on testimony, highlights and clarifies what is so controversial about this position, and shows how this position connects to broader philosophical issues concerning trust, the second person, and the role of authority in both theoretical and practical rationality. It will be of interest not only to specialists in epistemology but to anyone interested in the nature and significance of human sociality.

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