This book develops a sociological account of lie detection practices. Bringing together social theories of intersubjectivity with science and technology studies scholarship on ontologies, it examines how, in socio-legal contexts, it is determined whether an action is a lie or not, and with what consequence. Philosophical work on lying has focused on defining the phenomenon by reference to an individual's known intentions in order to then make moral prescriptions about human action. However, in this focus the philosophical project fails to articulate how lying is accomplished in everyday...