Harry G. Frankfurt is professor of philosophy emeritus at Princeton University. His books include the best-selling "On Bullshit" and "The Reasons of Love"

Harry G. Frankfurt, 2017 Charles Homer Haskins Prize Lecturer, American Council of Learned Societies

• Foreword by Rebecca Goldstein vii Preface to the Princeton Edition xiii Preface xvii Part One: THE FIRST MEDITATION CHAPTER 1: Introduction 3 CHAPTER 2: The General Overthrow of Belief 19 CHAPTER 3: The Criterion of Doubt 32 CHAPTER 4: The Perception of the Physical World 43 CHAPTER 5: The Strategy of the First Meditation 60 CHAPTER 6: Simple and Universal Things 75 CHAPTER 7: Mathematics in the First Meditation 84 CHAPTER 8: Mathematics and the Omnipotent Deceiver 93 CHAPTER 9: Demons, Dreamers, and Madmen 108 Part Two: REASON AND ITS VALIDATION CHAPTER 10: Sum 123 CHAPTER 11: Sum res cogitans 154 CHAPTER 12: Clear and Distinct Perception 175 CHAPTER 13: Objections to Descartes's Rule of Evidence 200 CHAPTER 14: Memory and Doubt 215 CHAPTER 15: The Validation of Reason 235 CHAPTER 16: Truth and Reality: The Galileo Controversy 250 Index 257

Harry G. Frankfurt is professor of philosophy emeritus at Princeton University. His books include the best-selling "On Bullshit" and "The Reasons of Love"

Harry G. Frankfurt, 2017 Charles Homer Haskins Prize Lecturer, American Council of Learned Societies

• Foreword by Rebecca Goldstein vii Preface to the Princeton Edition xiii Preface xvii Part One: THE FIRST MEDITATION CHAPTER 1: Introduction 3 CHAPTER 2: The General Overthrow of Belief 19 CHAPTER 3: The Criterion of Doubt 32 CHAPTER 4: The Perception of the Physical World 43 CHAPTER 5: The Strategy of the First Meditation 60 CHAPTER 6: Simple and Universal Things 75 CHAPTER 7: Mathematics in the First Meditation 84 CHAPTER 8: Mathematics and the Omnipotent Deceiver 93 CHAPTER 9: Demons, Dreamers, and Madmen 108 Part Two: REASON AND ITS VALIDATION CHAPTER 10: Sum 123 CHAPTER 11: Sum res cogitans 154 CHAPTER 12: Clear and Distinct Perception 175 CHAPTER 13: Objections to Descartes's Rule of Evidence 200 CHAPTER 14: Memory and Doubt 215 CHAPTER 15: The Validation of Reason 235 CHAPTER 16: Truth and Reality: The Galileo Controversy 250 Index 257

Harry G. Frankfurt is professor of philosophy emeritus at Princeton University. His books include the best-selling "On Bullshit" and "The Reasons of Love"

Harry G. Frankfurt, 2017 Charles Homer Haskins Prize Lecturer, American Council of Learned Societies

• Foreword by Rebecca Goldstein vii Preface to the Princeton Edition xiii Preface xvii Part One: THE FIRST MEDITATION CHAPTER 1: Introduction 3 CHAPTER 2: The General Overthrow of Belief 19 CHAPTER 3: The Criterion of Doubt 32 CHAPTER 4: The Perception of the Physical World 43 CHAPTER 5: The Strategy of the First Meditation 60 CHAPTER 6: Simple and Universal Things 75 CHAPTER 7: Mathematics in the First Meditation 84 CHAPTER 8: Mathematics and the Omnipotent Deceiver 93 CHAPTER 9: Demons, Dreamers, and Madmen 108 Part Two: REASON AND ITS VALIDATION CHAPTER 10: Sum 123 CHAPTER 11: Sum res cogitans 154 CHAPTER 12: Clear and Distinct Perception 175 CHAPTER 13: Objections to Descartes's Rule of Evidence 200 CHAPTER 14: Memory and Doubt 215 CHAPTER 15: The Validation of Reason 235 CHAPTER 16: Truth and Reality: The Galileo Controversy 250 Index 257