Moses Maimonides, scholar, physician, and philosopher, was the most influential Jewish thinker of the Middle Ages. In this magisterial new biography, the work of many years, Herbert Davidson provides an exhaustive guide to Maimonides' life and works. After considering Maimonides' upbringing and education, Davidson expounds all of his voluminous writings in exhaustive detail, with separate chapters on rabbinic, philosophical, and medical texts. This long-awaited volume is destined to become the standard work on this towering figure of Western (...) intellectual history. (shrink)

After a very brief introduction, Davidson begins with an informed and detailed account of the views of Aristotle and his major commentators, whose writings had enormous influence on the development of the medieval traditions. Davidson's account is supplemented with a critical exposition of the relevant teachings from the Plotiniana Arabica, from al-Kindi, and from a treatise on the soul attributed to Porphyry in the Arabic tradition. Impressive as all this is, it is simply stage setting for Davidson's (...) detailed accounts of the doctrines and arguments of al-Farabi, Avicenna, and Averroes. (shrink)

Là où on peut dater les commentaires d'Averroès sur Aristote, le Commentaire Moyen d'une œuvre donnée peut être considéré comme antérieur au Commentaire Long. En accompagnement de sa belle édition du Commentaire Moyen d'Averroès sur leDe anima, A. Ivry a soutenu que dans ce cas-ci les choses sont inversées et que le Commentaire Moyen duDe animaest “une version abrégée et révisée” du Commentaire Long de la même œuvre. Ivry développe sa thèse avec le plus de détails dansArabic Sciences and Philosophy, (...) 5. Là, il soutient que deux passages dans le Commentaire Moyen duDe animase rapportent nominalement au Commentaire Long, qu'un troisième passage fait allusion au Commentaire Long, et que dans d'autres passages le Commentaire Moyen et le Commentaire Long utilisent une phraséologie semblable et qu'on peut considérer que le premier a été la version abrégée du second. Le présent article répond à cette thèse de la manière suivante: les deux passages dans le Commentaire Moyen qui semblent selon d'lvry se rapporter explicitement au Commentaire Long peuvent vraisemblablement être compris comme des references a l'intérieur du Commentaire Moyen lui-même. Le passage qu'il comprend comme faisant allusion au Commentaire Long ne fait pas réellement allusion à cette œuvre, mais constitue une référence non-equivoque à une section ultérieure du Commentaire Moyen. II n'y a rien qui justifie le fait de regarder les passages dans le Commentaire Moyen cités par Ivry et utilisent une phraséologie semblable à celle du Commentaire Long comme des emprunts faits à ce dernier. Au cours de son argumentation, Ivry mentionne la position d'Averroes sur la nature de l'intellect materiel de l'homme, question qui a donne a Averroes le plus de peine dans ses commentaires sur le De anima d'Aristote et qui, depuis lors, a le plus intrigue ceux qui etudient Averroes. Le présent article souligne que sur le sujet de l'intellect materiel de l'homme, ni le Commentaire Moyen, ni le Commentaire Long sur leDe animan'empruntent I'un a l'autre, car les conceptions de l'intellect matériel qu'ils embrassent sont différentes et incompatibles. (shrink)

A study of problems, all revolving around the subject of intellect in the philosophies of Alfarabi, Avicenna, and Averroes, this book starts by reviewing discussions in Greek and early Arabic philosophy which served as the background for the three Arabic thinkers. Davidson examines the cosmologies and theories of human and active intellect in the three philosophers and covers such subjects as: the emanation of the supernal realm from the First Cause; the emanation of the lower world from the transcendent (...) active intellect; stages of human intellect; illumination of the human intellect by the transcendent active intellect; conjunction of the human intellect with the transcendent active intellect; prophecy; and human immortality. Davidson shows that medieval Jewish philosophers and the Latin Scholastics had differing perceptions of Averroes because they happened to use works belonging to different periods of his philosophic career. (shrink)

A study of problems, all revolving around the subject of intellect in the philosophies of Alfarabi, Avicenna, and Averroes, this book starts by reviewing discussions in Greek and early Arabic philosophy which served as the background for the three Arabic thinkers. Davidson examines the cosmologies and theories of human and active intellect in the three philosophers and covers such subjects as: the emanation of the supernal realm from the First Cause; the emanation of the lower world from the transcendent (...) active intellect; stages of human intellect; illumination of the human intellect by the transcendent active intellect; conjunction of the human intellect with the transcendent active intellect; prophecy; and human immortality. Davidson shows that medieval Jewish philosophers and the Latin Scholastics had differing perceptions of Averroes because they happened to use works belonging to different periods of his philosophic career. (shrink)

The central debate of natural theology among medieval Muslims and Jews concerned whether or not the world was eternal. Opinions divided sharply on this issue because the outcome bore directly on God's relationship with the world: eternity implies a deity bereft of will, while a world with a beginning leads to the contrasting picture of a deity possessed of will. In this exhaustive study of medieval Islamic and Jewish arguments for eternity, creation, and the existence of God, Herbert (...) class='Hi'>Davidson provides a systematic classification of the proofs, analyzes and explains them, and traces their sources in Greek philosophy. Throughout the study, Davidson tries to take into account every argument of a philosophical character, disregarding only those arguments that rest entirely on religious faith or which fall below a minimal level of plausibility. (shrink)

The book contains the first systematic study of the ontology and metaphysics of Gustav Bergmann, tracing their development from early (1940s) criticisms of Carnap's semantical theories in Introduction to Semantics, to their culmination in his 1992 New Foundations of Ontology. This involves a detailed study of the implicit metaphysical doctrines in Carnap's important, but long neglected, 1942 book and their connection to his influential views on reference, truth and modality, (including, contrary to current opinion, Carnap's initiating the development of predicate (...) modal logic) that culminated in Meaning and Necessity. In dealing with various fundamental issues in ontology and metaphysics, the book discusses relevant views of major philosophers, such as Russell, Moore, Bradley, Wittgenstein, Meinong, Brentano, Husserl, Broad, McTaggart, and Quine, and of contemporary and recent figures, including D. M. Armstrong, D. Lewis, S. Kripke, J. Searle, W. Sellars, D. Davidson, J. J. C. Smart, and H. Feigl. Building on the critical studies of Bergmann, Carnap and such other philosophers, the author argues for a form of Logical Realism derived from important, but long misunderstood and ignored, aspects of Russell's theories of descriptions, reference and truth. (shrink)

Truth is an embattled concept; many different positions have been put forward. One widely influential contribution has been Donald Davidson's theory. Although it has been derived from Alred Tarski's formal account of truth it has been claimed to offer a pragmatical solution to the problem by e.g. Richard Rorty. This dialogue explores the attraction Davidson's theory offers to philosophers of realist as well as relativist persuasion. There seems to be a core position useful to any of those philosophical (...) schools: Truth occurs at the interface of two languages or two usages of a language. Some consequences of such a point of view are discursively explored. (shrink)

Consider statements like ``Machines will never be able to think'' or ``You cannot turn a cat into a dog''. Many people will find such propositions evident, but we have learned to be cautious. 100 years from now things might look very different; it seems unduly dogmatic to insist on todays opinions as unrevisable points of reference, disallowing future breakthroughs in computer science or biology. The scientific outlook presupposes and enhances a high degree of curiosity and it seems a good idea (...) to generally keep one's meanings flexible so as to master break-downs of everyday understanding induced by unforseen circumstances, science or technology. Such intuitions are at the heart of Quine's philosophy. According to him we find ourselves enmeshed within a web of belief that joins together past and present attitudes, cognitive procedures and evidential tests. The strands show various degrees of coherence and interconnectedness and there are no general rules on how to proceed in case something unexpected happens. Sometimes it is ignored, sometimes it is explained away and sometimes it induces more or less extensive changes in our predictive and behavioural patterns. This seems to be the lesson drawn from the Vienna Circle's battle against metaphysics. Philosophers like Putnam, Kripke and Davidson have, it is true, come up with accounts of meaning, necessity and reality that seriously challenge Quine's indeterminacy of translation and ontological relativity, re-introducing elements of a priori presuppositions and (quasi-)transcendental arguments into philosophical discourse. But - compared to Quine's unrelenting insistence on naturalistic first-level talk - those attempts have a free-floating, speculative touch. Quine refuses to engage in elaborate philosophical constructions designed to block the permanent drift of meaning. His is a truly radical position, admirably suggestive and provocative, to be challenged on its own ground. The untenability of a priori truth is suggested by profound experiences that cannot easily be refuted by arguments purporting to show how some more or less exotic sentences could, after all, be held immune from change.1 If the untenability thesis is to be shaken a more down to earth strategy seems to be called for. It would have to be shown that Quine's radical move entails consequences that are highly unattractive even according to its own standards. (shrink)

First published in 1889. This re-issues the second, revised edition of 1926. Chuang Tzu was to Lao Tzu, the author of Tao Tê Ching, as Hui-neng, the sixth Patriarch of Zen Buddhism, was to Bodhidharma, and in some respects St.Paul to Jesus; he expanded the original teaching into a system and was thus the founder of Tao-ism. Whereas Lao Tzu was a contemporary of Confucius in the sixth century B.C, Chuang Tzu lived over two hundred years later. He was one (...) of the greatest minds produced by China; philosopher, metaphysician, moralist and poet. It is impossible to understand the spiritual depth of the Tao Tê Ching without the aid of Chuang Tzu. (shrink)

What can reason do for us and what can't it do? This is the question examined by Herbert A. Simon, who received the 1978 Nobel Prize in Economic Sciences "for his pioneering work on decision-making processes in economic organizations." The ability to apply reason to the choice of actions is supposed to be one of the defining characteristics of our species. In the first two chapters, the author explores the nature and limits of human reason, comparing and evaluating the (...) major theoretical frameworks that have been erected to explain reasoning processes. He also discusses the interaction of thinking and emotion in the choice of our actions. In the third and final chapter, the author applies the theory of bounded rationality to social institutions and human behavior, and points out the problems created by limited attention span human inability to deal with more than one difficult problem at a time. He concludes that we must recognize the limitations on our capabilities for rational choice and pursue goals that, in their tentativeness and flexibility, are compatible with those limits. (shrink)

Cognitive science is, of course, not really a new discipline, but a recognition of a fundamental set of common concerns shared by the disciplines of psychology, computer science, linguistics, economics, epistemology, and the social sciences generally. All of these disciplines are concerned with information processing systems, and all of them are concerned with systems that are adaptive—that are what they are from being ground between the nether millstone of their physiology or hardware, as the case may be, and the upper (...) millstone of a complex environment in which they exist. Systems that are adaptive may equally well be described as “artificial,” for as environments change, they can be expected to change too, as though they were deliberately designed to fit those environments (as indeed they sometimes are).The task of empirical science is to discover and verify invariants in the phenomena under study. The artificiality of information processing systems creates a subtle problem in defining empirical invariants in such systems. For observed regularities are very likely invariant only within a limited range of variation in their environments, and any accurate statement of the laws of such systems must contain reference to their relativity to environmental features. It is a common experience in experimental psychology, for example, to discover that we are studying sociology—the effects of the past histories of our subjects—when we think we are studying physiology—the effects of properties of the human nervous system. Similarly, business cycle economists are only now becoming aware of the extent to which the parameters of the system they are studying are dependent on the experiences of a population with economic events over the previous generation.In artificial sciences, the descriptive and the normative are never far apart. Thus, in economics, the “principle of rationality” is sometimes asserted as a descriptive invariant, sometimes as advice to decision makers. Similarly, in psychology, the processes of adaptation (learning) have always been a central topic, at one time a topic that dominated the whole field of research. Linguistics, too, has suffered its confusions between descriptive and normative attitudes towards its subject. But we must avoid the error, in studying information processing systems, of thinking that the adaptive processes themselves must be invariant; and we must be prepared to face the complexities of regression in the possibility that they themselves may be subject to improvement and adaptation.It might have been necessary a decade ago to argue for the commonality of the information processes that are employed by such disparate systems as computers and human nervous systems. The evidence for that commonality is now overwhelming, and the remaining questions about the boundaries of cognitive science have more to do with whether there also exist nontrivial commonalities with information processing in genetic systems than with whether men and machines both think. (shrink)

It is often claimed that there can be no such thing as a logic of scientific discovery, but only a logic of verification. By 'logic of discovery' is usually meant a normative theory of discovery processes. The claim that such a normative theory is impossible is shown to be incorrect; and two examples are provided of domains where formal processes of varying efficacy for discovering lawfulness can be constructed and compared. The analysis shows how one can treat operationally and formally (...) phenomena that have usually been dismissed with fuzzy labels like 'intuition' and 'creativity'. (shrink)

Cognitive science is, of course, not really a new discipline, but a recognition of a fundamental set of common concerns shared by the disciplines of psychology, computer science, linguistics, economics, epistemology, and the social sciences generally. All of these disciplines are concerned with information processing systems, and all of them are concerned with systems that are adaptive—that are what they are from being ground between the nether millstone of their physiology or hardware, as the case may be, and the upper (...) millstone of a complex environment in which they exist. Systems that are adaptive may equally well be described as “artificial,” for as environments change, they can be expected to change too, as though they were deliberately designed to fit those environments (as indeed they sometimes are).The task of empirical science is to discover and verify invariants in the phenomena under study. The artificiality of information processing systems creates a subtle problem in defining empirical invariants in such systems. For observed regularities are very likely invariant only within a limited range of variation in their environments, and any accurate statement of the laws of such systems must contain reference to their relativity to environmental features. It is a common experience in experimental psychology, for example, to discover that we are studying sociology—the effects of the past histories of our subjects—when we think we are studying physiology—the effects of properties of the human nervous system. Similarly, business cycle economists are only now becoming aware of the extent to which the parameters of the system they are studying are dependent on the experiences of a population with economic events over the previous generation.In artificial sciences, the descriptive and the normative are never far apart. Thus, in economics, the “principle of rationality” is sometimes asserted as a descriptive invariant, sometimes as advice to decision makers. Similarly, in psychology, the processes of adaptation (learning) have always been a central topic, at one time a topic that dominated the whole field of research. Linguistics, too, has suffered its confusions between descriptive and normative attitudes towards its subject. But we must avoid the error, in studying information processing systems, of thinking that the adaptive processes themselves must be invariant; and we must be prepared to face the complexities of regression in the possibility that they themselves may be subject to improvement and adaptation.It might have been necessary a decade ago to argue for the commonality of the information processes that are employed by such disparate systems as computers and human nervous systems. The evidence for that commonality is now overwhelming, and the remaining questions about the boundaries of cognitive science have more to do with whether there also exist nontrivial commonalities with information processing in genetic systems than with whether men and machines both think. (shrink)

It is shown how a causal ordering can be defined in a complete structure, and how it is equivalent to identifying the mechanisms of a system. Several techniques are shown that may be useful in actually accomplishing such identification. Finally, it is shown how this explication of causal ordering can be used to analyse causal counterfactual conditionals. First the counterfactual proposition at issue is articulated through the device of a belief-contravening supposition. Then the causal ordering is used to provide modal (...) categories for the factual propositions, and the logical contradiction in the system is resolved by ordering the factual propositions according to these causal categories. (shrink)

The task of axiomatizing physical theories has attracted, in recent years, some interest among both empirical scientists and logicians. However, the axiomatizations produced by either one of these two groups seldom appear satisfactory to the members of the other. It is the purpose of this paper to develop an approach that will satisfy the criteria of both, hence permit us to construct axiomatizations that will meet simultaneously the standards and needs of logicians and of empirical scientists.