Few developments in the intellectual life of the oast quarter-century have provoked more controversy than the attempt to engineer humanlike intellegence by artificial means. Born of computer science, this effort has sparked a comtinuing debate among the psychologists, neuroscientists, philosophers, and linguists who have pioneered - and criticized - Artificial Intelligence Are there general principle, as some computer scientists ha originally hoped, that would fully describe the activity of both animal and machine minds, just as aereodynamics accounts for the filgiht of bird and airplanes? Twenty leading researachers address this and other vexing questions in the field that make up cognitive science.