1986 Preface ix Acknowledgments xvii Prologue:"The Heart Has Its Reasons That Reason Hman itiition Does Not Know' 1 and Expertise in 1.Five Steps from Novice to Expert 16 the Eraofthe 2.Logic Machines and Their Limits 52 Computer 3.Artificial Intelligence:From High Hopes to Sober Reality 67 4.Expert Systems Versus Intuitive Expertise 101 5.Computers in the Classroom:Tools,Tutors,and Tutees 122 Managerial Art and Management Science 158 Mind over Conclusion:People That (Sic)Think 193 Epilogue:Rational Animals Are Obsolete 202 Notes 207 Machine Index 225 Hubert L Dreyfus Stuart E.Dreyfus S 1986