Testimonial Evidence

Abstract

Knowledge through what others tell us not only forms a large part of the body of our knowledge but also originates the patterns of appraisal according to which we add beliefs to our present store of knowledge.¹ I do not mean merely that what we add is often accepted from persons who have already contributed to our knowledge; beyond that, we have acquired habits of thought, tendencies to suspect and tendencies to approve both other-person-reports and purported perceptions, from our testimonial relationships with others. For instance, who would not hesitate to say he saw a particular acquaintance (John Doe) at a visual distance of half a block, after he had just been told by someone he trusted and someone who ought to have known (e.g., John Doe’s wife) that John Doe had just telephoned from a store two hours travel time away? Yet apart from that report, one might have considered it evident that John Doe was half a block away, just because (ceteris paribus) it looked enough like John Doe; the evidence of our senses can be defeated by the authority we accord to the evidence of testimony.

This paper was originally prepared for the Fullerton Club, April 1967, and is presented here with updating revisions.