The Informational Richness of Testimonial Contexts

An influential idea in the epistemology of testimony is that people often acquire justified beliefs through testimony, in contexts too informationally poor for the justification to be evidential. This has been described as the Scarcity of Information Objection ( SIO ). It is an objection to the reductive thesis that the acceptance of testimony is justified by evidence of general kinds not unique to testimony. SIO hinges on examples intended to show clearly that testimonial justification arises in low‐information contexts; I argue that the common examples show no such thing. There is a great deal of information available in testimonial contexts, including in the examples alleged to show otherwise – enough information to render SIO implausible. Purported SIO examples tend to give a wrong impression about the informational richness of testimonial contexts, I argue, due to the lack of detail in which they are presented.