Interpersonal Reasoning: A Philosophical Psychology of Testimonial Trust

Anscombe famously said, “It is an insult and it may be an injury not to be believed.” But what is it to believe someone? My aim is to show that understanding what it is to believe someone requires a conception of a distinctive kind of interpersonal reasoning. To do so, I develop an analogy between interpersonal reasoning and an Anscombean conception of practical reasoning. I suggest that the distinctive ‘form’ of interpersonal reasoning is recognition. I furthermore argue that this is to be understood as a primarily logical, rather than epistemological point. In concluding, I explain why a notion of interpersonal reasoning makes available an ethics of thought and, specifically, an account of testimonial injustice.