This book investigates the linguistic and ethical criteria used to distinguish between various forms of untruthfulness, specifically focusing on the concepts of bullshit, lies, and insincerity. Chris Heffer, a scholar in forensic linguistics and discourse analysis, utilizes a framework grounded in speech act theory and pragmatics to evaluate how speakers are held accountable for their claims. The text examines the intersection of intent, social responsibility, and the public perception of truth in contemporary discourse.

Experts in linguistics and philosophy identify this work as a rigorous contribution to the study of deceptive discourse. Readers frequently note the academic density of the prose, which requires a foundational understanding of pragmatics and speech act theory to fully grasp the author's arguments.