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IN 1959 and 1960 I gave the Gifford Lectures in the University of St. Andrews. The lectures were called 'Norms and Values, an Inquiry into the Conceptual Foundations of Morals and Legislation'. The present work is substantially the same as the content of the second series of lectures, then advertised under the not very adequate title 'Values'. It is my plan to publish a revised version of the content of the first series of lectures, called 'Norms', as a separate book. (...) The two works will be independent of one another. (shrink)

First published in 2000. Routledge is an imprint of Taylor & Francis, an informa company.

The Unprovability of Consistency is concerned with connections between two branches of logic: proof theory and modal logic. Modal logic is the study of the principles that govern the concepts of necessity and possibility; proof theory is, in part, the study of those that govern provability and consistency. In this book, George Boolos looks at the principles of provability from the standpoint of modal logic. In doing so, he provides two perspectives on a debate in modal logic that has persisted (...) for at least thirty years between the followers of C. I. Lewis and W. V. O. Quine. The author employs semantic methods developed by Saul Kripke in his analysis of modal logical systems. The book will be of interest to advanced undergraduate and graduate students in logic, mathematics and philosophy, as well as to specialists in those fields. (shrink)

This article contains an overview of the author's long‐standing involvement with deontic logic, both from a technical and from a wider philosophical point of view. As far as the formal aspects of deontic logic are concerned, the author describes his intellectual development from the original discovery of the analogy between modal (and deontic) notions on the one hand, and quantifiers on the other, through the formulation of a systematic theory of dyadic deontic concepts, to the proposal of a formal logic (...) of action as a foundation for deontic logic. In a more philosophical vein, the author discusses such questions as the very possibility of deontic logic if norms have no truth‐value, the relation between the descriptive interpretation of classical deontic logic and the logic of norm‐propositions, the correct representation of conditional or hypothetical norms, the distinction between moral obligation and practical necessity, and the interdefinability of permission and obligation. (shrink)

A feature of the spiritual physiognomy of the twentieth century has been belief in "progress" and in the beneficial influence on human wellbeing of science and technology. Wittgenstein never shares these optimistic sentiments. Towards the end of his life he wrote that there is nothing absurd in the belief that the age of science and technology is "the beginning of the end of humanity" and that mankind steering its course towards the future relying on scientific rationality "is falling into a (...) trap. His life and also his philosophy was a protest against these trends and a search for "a changed mode of thought and life". (shrink)

First published in 2000. Routledge is an imprint of Taylor & Francis, an informa company.

The typescripts from which both parts of Wittgenstein's Investigations were printed are now lost. Of the TS for Part I there exists a second copy, but not so of the TS for Part II. There is, however, a manuscript in Wittgenstein's hand which contains the whole of the printed Part II - and some additional material. A comparision of this MS with the printed text reveals some interesting discrepancies. They are noted in the paper. Moreover, a detailed comparision is made (...) in a Postscript between the printed Preface of the Investigations and another, obviously earlier, version of it. Both versions are dated "Cambridge, January 1945" - but the printed one was probably not prepared until two years later. (shrink)

In this paper, the author revisits “the emotive theory of value” and argues that values are not entities but nothing other than “linguistic fictions”. Accordingly, valuations—i.e., valuing actions—can be defined as approving or disapproving attitudes of a subject to some object. In this perspective, values cannot be true or false: What we can do is just compare them with regard to strength. As a consequence, value judgments are to be understood as sentences which are used either to say that a (...) subject s values an object o positively or negatively, or to express (evince) a valuation. The author then shows some relations between normative and evaluative discourses. First, he claims that norms as well as valuations are not true or false. Second, he argues that both may be explained or justified, even if the former are usually justified teleologically whereas the latter are explained referring back to the subject's background and life‐style. Third, he notes that a legal order originates from the fact that valuations “crystallize” into norms. Finally, the author examines some further questions related to his analysis. In particular, he argues that the different realms of values, e.g., morals, aesthetics, politics, etc., do not correspond to different evaluative attitudes, but to different phenomena and diverse spheres of human life. (shrink)

Het idee van de vooruitgang is jong, gezien in het licht van de menselijke beschaving. De oude Griekse mythologie schilderde een cyclische neergang, steeds slechtere tijden wisselden elkaar af, tot uit de absolute neergang weer iets nieuw zou ontstaan, de joodse visie was lineair, er was een steeds grotere neergang tot de Messias een nieuw tijdperk zou inluiden. De moderne idee van vooruitgang heeft twee hoofdstromingen, de voortuitgang van de techniek en de vervolmaakbaarheid van de mens, met universele democratie als (...) einddoel. De middelen om dit doel te bereiken zijn nog niet gevonden. (shrink)

Ett urval essäer, reportage, recensioner och insändare. De behandlar existentiella frågor, kapprustningen, idén om en stundande ekokatastrof och visar nya sidor hos den nordiska filosofins superstjärna. Ges ut i samarbete med Svenska litteratursällskapet i Finland.[Bokinfo].

Humanismens förfall.--Kunskapens träd.--Naturen, människan och den vetenskapligt-tekniska revolutionen.--Enhet och splittring i vetenskapen.--Människor, matematik och maskiner.--Om Marx och marxismen.--Humanismen som livshållning.

The Entretiens of the Institut International de Philosophie for 1978 were held in connection with the World Congress of Philosophy in Dusseldorf, from August 27 to September 1. The theme of the Entretiens was Logic and Philosophy. The undersigned, then President of LI.P., was responsible for the planning of the programme. The programme was designed to consist of four sections with the headings Classical and Intuitionist Logic, Modal Logic and its Applications, Inductive Logic and its Applications, and Logic and Epistemology. (...) The aim was also to convey to philosophers who are not experts in logic an informative and representative impression of some of the main sectors of the vast and rapidly expanding field of philosophical logic. At the same time it was thought that this impression should not be conveyed in the form of a series of survey papers but through presentations and discussions of specific topics falling under the main headings men tioned above. For each section a rapporteur was nominated to read a paper and an interlocuteur to comment on it. The programme chairman is grateful that he was able to engage a representative selection of front rank philosophi cal logicians to perform the various tasks. The papers and the comments are printed in this volume in the order in which they appeared in the Programme of the Entretiens. (shrink)