Logic is often treated as the highest form of human reasoning.In practice, it is one of our most reliable tools for self-deception.In The Lie of Logic, Evan Calder examines why intelligent people consistently believe things that are false, defend positions that harm them, and mistake internal coherence for accuracy.Drawing on behavioral psychology, cognitive science, and historical pattern analysis, this book dissects how beliefs are formed, protected, and reinforced by the mind itself. Rather than focusing on advice or self-improvement, it maps the mechanisms behind rationalization, emotional certainty, and motivated reasoning.The first half of the book focuses on structure: how beliefs take shape and why they persist even when evidence contradicts them.The latter sections examine consequences: how these same mechanisms surface in modern relationships, identity conflicts, and power dynamics, often without conscious awareness.This is not a guide to better thinking.It is an analysis of why better thinking so often fails.This book is for readers who want to understand behavior, not correct it.