The conceptual structure of perjury

Alison Douglis argues that perjury is nothing more than a tool to facilitate court proceedings, conceptually distinct from lying. Instead, I argue that the conceptual structure of perjury and of lying match almost perfectly. Apparent mismatches do not arise as a property of perjury but as a consequence of the juridical context. I present an overview of some of the recent philosophical work on lies with focus on the problem of ‘what is said’ and pragmatic enrichment. I also discuss the question of whether false implicatures should be regarded as lies, the intent to deceive condition on lying, and the falsity of the statement as a condition on lying. I then turn to perjury and show that the same philosophical problems that lies give rise to are reproduced almost point by point. I show that the oath condition and the materiality condition on perjury, which would seem to provide an empirical distinction, are in fact rooted in our understanding of lies. Against Jennifer Keiser and Douglis, I argue that a cross-examination is in fact a form of conversation in Grice’s sense.