This volume investigates the foundational role of testimony as a primary source of human knowledge and the philosophical challenges inherent in relying on the accounts of others. Edited by Jennifer Lackey and Ernest Sosa, the collection brings together twelve original essays from prominent philosophers to examine the conditions under which testimonial belief is justified. The contributors analyze the mechanisms of social knowledge transfer, addressing whether testimony requires independent evidence or if it functions as a basic source of warrant.

Experts identify this collection as a foundational text for contemporary research into the epistemology of testimony. Readers frequently note the academic density of the prose, which is intended for advanced students and professional philosophers working within the field of analytic epistemology.