The essays in this book, published here as a collection for the first time, are unified by the thesis that freedom, rationality, social consensus, and knowledge depend on thoughts about thoughts, that is, on metamental operations. These provide for our optionality, plasticity, and most of allfor the evaluation and control of lower-level information. The collection argues that the human mind is essentially a metamind. | Metamind by Keith Lehrer, Hardcover | Indigo Chapters