Gilbert Harman

ConclusionTo sum up. Doubts can be raised about cognitive psychoterapy. The charge of utopianism may apply in part. And a few quibbles are possible about other points. This hardly detracts from the enormous achievement of the book, which really sets a new standard for the subject, in my opinion. Brandt makes abundantly clear the importance and usefulness of trying to state issues in neutral nonmoral terminology in a way that permits them to be answered but also allows one to understand why one might be interested in the answers. He shows how psychological theory can be applied in philosophy in unsuspected ways. He greatly advances our understanding of the sorts of criticisms that actions are subject to, and therefore advances our understanding of practical reasons. He provides an excellent account of what a morality is. He raises an important issue about desire satisfaction versions of utilitarianism and presents a plausible theory concerning the measurement of a group's total happiness.

I have been supposing that for the theory of reasoning, explicit belief is an all-or-nothing matter, I have assumed that, as far as principles of reasoning are concerned, one either believes something explicitly or one does not; in other words an appropriate "representation" is either in one's "memory" or not. The principles of reasoning are principles for modifying such all-or-nothing representations. This is not to deny that in some ways belief is a matter of degree. For one thing implicit belief is certainly a matter of degree, since it is a matter of how easily and automatically one can infer something from what one believes explicitly. Furthermore, explicit belief is a matter of degree in the sense that one believes some things more strongly than others. Sometimes one is only somewhat inclined to believe something, sometimes one is not sure what to believe, sometimes one is inclined to disbelieve something, sometimes one is quite confident something is not so, and so forth.

Thoughts and other mental states are defined by their role in a functional system. Since it is easier to determine when we have knowledge than when reasoning has occurred, Gilbert Harman attempts to answer the latter question by seeing what assumptions about reasoning would best account for when we have knowledge and when not. He describes induction as inference to the best explanation, or more precisely as a modification of beliefs that seeks to minimize change and maximize explanatory coherence. Originally published in 1973. The Princeton Legacy Library uses the latest print-on-demand technology to again make available previously out-of-print books from the distinguished backlist of Princeton University Press. These editions preserve the original texts of these important books while presenting them in durable paperback and hardcover editions. The goal of the Princeton Legacy Library is to vastly increase access to the rich scholarly heritage found in the thousands of books published by Princeton University Press since its founding in 1905.

A proper understanding of intentionality is crucial to the study of a number of topics in cognitive science, including perception, imagery, and consciousness. The term itself, intentionality, can be misleading, in suggesting intentional action, doing something intentionally, with a certain aim or purpose. In cognitive science, the term is used in a different, more technical sense. Intentionality involves reference or aboutness or some similar relation to something having what the scholastics of the Middle Ages called intentional inexistence.

I am concerned with values in the descriptive rather than in the normative sense. I am interested in theories that seek to explain one or another aspect of people's moral psychology. Why do people value what they value? Why do they have other moral reactions? What accounts for their feelings, their motivations to act morally, and their opinions about obligation, duty, rights, justice, and what people ought to do? A moral theory like utilitarianism may be put forward as offering the correct normative account of justice, or of the good, or of what people ought morally to do. The answers such a theory offers may be surprising in suggesting that what people ought to do is quite different from what they think they ought to do. I am not concerned with normative moral theories of this revisionary sort. Indeed, I am interested in less revisionary normative theories only to the extent that they can be reinterpreted as offering potential explanations of people's actual moral reactions

The meaning of a symbol is determined by its use, but the canonical way of specifying meaning is in a statement of the form "S means...". To be able to provide such a specification is equivalent to being able to translate the symbol S into one's own terms. A change in usage of terms involves a change of meaning iff the correct translation between earlier usage and later usage takes a term into a different expression. Such translation is holistic, a matter of finding the best mapping. Sameness of meaning is a similarity relation, as is sameness of concept. The meaning of a larger expression is derived from the meaning of its parts iff the translation of the whole is derived from the translation of its parts.

Scott Sehon argues for a complex view about the relation between commonsense psychology and the physical sciences.1 He rejects any sort of Cartesian dualism and believes that the common-sense psychological facts supervene on the physical facts. Nevertheless he asserts that there is an important respect in which common-sense psychology is independent of the physical sciences. Despite supervenience, we are not to expect any sort of reduction of common-sense psychology to physical science, nor are we to expect the physical sciences to conflict with common-sense psychology.

Concepts, not the beliefs employing them, have uses or roles in thought. Most conceptual roles cannot be specified solipsistically, and do not have inner aspects that can be specified solipsistically. (To think otherwise is to confuse function with misfunction.) A theory of truth conditions plays no useful part in any adequate account of conceptual role. Ordinary views about beliefs assign them conceptual structures which figure in explanations of functional relations. Which conceptual structures beliefs have may be relative to an arbitrary choice of "analytical hypothesis" but that does not mean that there is an adequate nonrelative account that dispenses with a system of concepts or language of thought.