Carnap’s lectures at the 1935 Paris Congress for the Unity of Science marked the beginning of his mature metaphilosophy. This paper considers what role remained for epistemology once it was “purified” of all psychological elements as Carnap there demanded. It is argued that while this did mean the end of traditional epistemology, room was found for nontraditional versions in the course of the further development of Carnap’s logic of science.

In this paper, I will offer a novel perspective on Carnapian explication, understanding it as a philosophical analogue of the transfer principle methodology that originated in nineteenth-century projective geometry. Building upon the historical influence that projective geometry exerted on Carnap’s philosophy, I will show how explication can be modeled as a kind of transfer principle that connects, relative to a given task and normatively constrained by the desiderata chosen by the explicators, the functional properties of concepts belonging to different conceptual (...) frameworks. Moreover, I will demonstrate how, in light of this characterization, we can better appreciate the evolution of Carnap’s metaphilosophy. (shrink)

Carnap’s 1931 attack against metaphysics notoriously utilises Heidegger’s work to exemplify the meaninglessness of metaphysical pseudo‐statements. This paper interprets Carnap’s metametaphysics as concerned with delimiting theoretical dialogue in such a manner as to exclude unresolvable disagreements. It puts forth a revised version of Carnap’s argument against the viability of metaphysics, by setting aside his stronger claims that rely on verificationism and focusing instead on his account of metaphysical claims as mere expressions of what he calls “Lebensgefühl,” or a general attitude (...) towards life. Such attitudes, Carnap argues, are unsuitable objects of theoretical dialogue, insofar as disagreements that concern them are unresolvable. Carnap thus recommends abandoning the attempt to resolve metaphysical disagreements as if they were theoretical. As long as it does not enter into unresolvable disagreements, art, rather than theory, is the appropriate medium for expressing Lebensgefühl. (shrink)

Rudolf Carnap defended two quite different critiques of traditional philosophy: in addition to the much discussed verifiability criterion, he also proposed a critique based upon "formalizability." Formalizability rests upon the principle of tolerance plus an acceptance of a linguistic methodology. Standard interpreters of Carnap (e.g., [7] and [8]) assume that the principle of tolerance (and, hence, formalizability) gains its argumentative support from verificationism. Carnap, in fact, kept the two critiques separate and independent. Indeed, verificationism is even, in spirit, inconsistent with (...) tolerance. If the formalizability approach is emphasized, traditional metaphysics is reconstructed, not banished. Philosophical disputes remain rationally decidable, but metatheoretical in nature. Two results follow: Carnap's metaphilosophy cannot be rejected merely on the basis of rejections of verifiability. Second, Carnap's conclusion that all philosophy concerns language provides no reason for despair. (shrink)

Available for the first time in 20 years, here is the Rudolf Carnap's famous principle of tolerance by which everyone is free to mix and match the rules of ...

As a leading member of the Vienna Circle, Rudolph Carnap's aim was to bring about a "unified science" by applying a method of logical analysis to the empirical data of all the sciences. This work, first published in English in 1934, endeavors to work out a way in which the observation statements required for verification are not private to the observer. The work shows the strong influence of Wittgenstein, Russell, and Frege.

A basic system of inductive logic; An axiomatic foundation for the logic of inductive generalization; A survey of inductive systems; On the condition of partial exchangeability; Representation theorems of the de finetti type; De finetti's generalizations of excahngeability; The structure of probabilities defined on first-order languages; A subjectivit's guide to objective chance.

Stimulating, thought-provoking text by one of the 20th century’s most creative philosophers clearly and discerningly makes accessible such topics as probability, measurement and quantitative language, structure of space, causality and determinism, theoretical laws and concepts and much more. "...the best book available for the intelligent reader who wants to gain some insight into the nature of contemporary philosophy of science."—Choice.

"By looking at Frege's lectures on logic through the eyes of the young Carnap, this book casts new light on the history of logic and analytic philosophy. As two introductory essays by Gottfried Gabriel and by Erich H. Reck and Steve Awodey explain, Carnap's notes allow us to better understand Frege's deep influence on Carnap and analytic philosophy, as well as the broader philosophical matrix from which both continental and analytic styles of thought emerged in the 20th century."--BOOK JACKET.

The first volume of the Library of Living Philosophers (LLP) appeared in 1939, the brainchild of the late Professor Paul A. Schilpp. Schilpp saw that it would help to eliminate confusion and endless sterile disputes over interpretation if great philosophers could be confronted by their capable philosophical peers and asked to reply. As well as a number of critical essays with the chosen philosopher's replies to each essay, each volume would include an intellectual autobiography and an up-to-date bibliography The LLP (...) series has exceeded even Schilpp's expectations, enabling great philosophers to do more than clarify by extending and elaborating their thoughts. A volume in the Library of Living Philosophers is not merely a commentary on a philosopher's work; it is a critical part of that work. (shrink)

Three indexes have been compiled: authors of main articles (including our special departments such as ‘Projects in progress’ and ‘Notes and discussions’); essay reviews; and book reviews. Co-author...

Autour du Manifeste de Vienne se trouvent reunis des textes fondateurs ecrits autour de 1929. Leurs auteurs: Carnap, Hahn, Neurath, Schlick l'ame du Cercle de Vienne, et Waismann plus proche de Wittgenstein, temoignent d'un courant philosophique constituant aujourd'hui la tradition analytique de source continentale a la fois empiriste et logique. Forme de maniere informelle a Vienne, au coeur de l'Europe, le Cercle reunissait des savants de differentes branches qui voulaient se donner une philosophie susceptible d' unifier leurs vues. Echo aux (...) reves d'unite de la science, cette philosophie en exprime aussi le renversement complet. Veritable Discours de la methode, mais d'esprit anti-cartesien, elle entend reconstruire la science de maniere a evincer la speculation metaphysique, le but etant qu'aucun enonce ne soit laisse a l'exterieur de cette grande architecture de symboles s'il etait pourvu de sens. La declaration de guerre contre la metaphysique est un geste de militance a une epoque riche en differents manifestes. Incomprehensible en dehors du contexte socio-politique viennois de ces annees, elle porte aussi un programme de reconstruction rationnelle qui, au dela du langage de la science, devait toucher tous les secteurs de la vie. Plus complexe qu'il n'y parait, ce programme contient, en reference a Wittgenstein, son prestigieux representant a cote d'Einstein et Russell, une mise en garde contre differentes formes d'irrationalismes, qui est d'actualite. (shrink)

A basic system of inductive logic; An axiomatic foundation for the logic of inductive generalization; A survey of inductive systems; On the condition of partial exchangeability; Representation theorems of the de finetti type; De finetti's generalizations of excahngeability; The structure of probabilities defined on first-order languages; A subjectivit's guide to objective chance.

In Carnap’s autobiography, he tells the story how one night in January 1931, “the whole theory of language structure” in all its ramifications “came to [him] like a vision”. The shorthand manuscript he produced immediately thereafter, he says, “was the first version” of Logical Syntax of Language. This document, which has never been examined since Carnap’s death, turns out not to resemble Logical Syntax at all, at least on the surface. Wherein, then, did the momentous insight of 21 January 1931 (...) consist? We seek to answer this question by placing Carnap’s shorthand manuscript in the context of his previous efforts to accommodate scientific theories and metalinguistic claims within Wittgenstein’s Tractatus theory of meaning. The breakthrough of January 1931 consists, from this viewpoint, in the rejection of the Tractatus theory in favor of the meta-mathematical perspective of Hilbert, Gödel, and Tarski. This was not yet the standpoint of the published Logical Syntax, as we show, but led naturally to the “principle of tolerance” and thus to Carnap’s mature philosophy, in which the inconsistencies between this first view and the principle of tolerance, which survived into the published Syntax, were overcome. (shrink)

This is the Spanish translation, by Valeria Sol Valiño, of Rudolf Carnap’s classical text “Die logizistische Grundlegung der Mathematik”, which was originally presented at the Königsberg’s Symposium on Philosophy of Mathematics in 1930, and finally published in Erkenntnis in 1931.

This book discusses the problem of mathematical knowledge, and its broader philosophical ramifications. It argues that the problem of explaining the (defeasible) justification of our mathematical beliefs (‘the justificatory challenge’), arises insofar as disagreement over axioms bottoms out in disagreement over intuitions. And it argues that the problem of explaining their reliability (‘the reliability challenge’), arises to the extent that we could have easily had different beliefs. The book shows that mathematical facts are not, in general, empirically accessible, contra Quine, (...) and that they cannot be dispensed with, contra Field. However, it argues that they might be so plentiful that our knowledge of them is intelligible. The book concludes with a complementary ‘pluralism’ about modality, logic and normative theory, highlighting its revisionary implications. Metaphysically, pluralism engenders a kind of perspectivalism and indeterminacy. Methodologically, it vindicates Carnap’s pragmatism, transposed to the key of realism. (shrink)

What are Carnap's views on the epistemology of mathematics? Did he believe in a priori justification, and if so, what is his account of it? One might think that such questions are misguided, since in the 1930s Carnap came to reject traditional epistemology as a confused mixture of logic and psychology. But things are not that simple. Drawing on recent work by Richardson and Uebel, I will show that Carnap's mature metaphilosophy leaves room for two distinct notions of a (...) priori justification: one propositional, the other doxastic. The latter is especially interesting since it comes closest to a traditional understanding of a priority. On the other hand, Carnap has little to say about doxastic justification in his writings. This lacuna can be filled by drawing on an unpublished exchange with Irving M. Copi. In it, so I will show, Carnap endorses the view that agents can come to know all mathematical truths a priori. This fact, so I will further argue, can be used to adjudicate a dispute between Ricketts and Friedman about the nature and viability of Carnap's philosophy of mathematics—specifically his reliance on infinitary methods. (shrink)

Recent Anglophone scholarship has successfully shown that Nietzsche's thought makes important contributions to a wide range of contemporary philosophical debates. In so doing, however, scholarship has lost sight of another important feature of Nietzsche's project, namely his desire to challenge the very conception of philosophy that has been used to assess his merits as a philosopher. In other words, contemporary scholarship has overlooked Nietzsche's contributions to metaphilosophy, i.e. debates around the nature, methods, and aims of philosophy. This important new (...) collection of essays brings together an international group of distinguished scholars to explore and discuss these contributions and debates. It will appeal to anyone interested in metaphilosophy, Nietzsche studies, German studies, or intellectual history. (shrink)

The relationship between American pragmatism and logical empiricism is complicated at best. The received view is that by around the late 1930s or early 1940s pragmatism had been replaced, supplanted, or eclipsed by the younger and more logic-oriented form of empiricism developed in interwar Vienna. Recently, however, this picture has been challenged, and this paper offers further reasons for thinking that the received view is inadequate. Through a critical examination of William James's Pragmatism and “The Sentiment of Rationality” and Rudolf (...) Carnap's “Elimination of Metaphysics Through Logical Analysis of Language” and other works, the paper builds a case for the existence of a rather striking correspondence between the work of one of pragmatism's most vaunted figures and the thought of logical empiricism's most famous advocate. Not only were both philosophers interested in what might be called metaphilosophy or the psychology of philosophy, both held very similar deflationary views. (shrink)

The article presents a critical semantic analysis of the so-called analytical truths as they were discussed by R. Carnap and building on some new empirical data that are not fully satisfactorily explained by Carnap’s theory. A theoretical reconstruction of Carnap’s theory of analytical truths is proposed. It is demonstrated how his understanding of analytical truths, as statements that are true in all possible worlds and amenable to a quite obvious definition on a par with the concepts of sense (meaning) and (...) synonymy, applies exclusively to artificial languages of logic. Therefore, Carnap’s theory remains unreachable for the well-known criticism of W. Quine, who, in turn, pointed out the difficulties in defining these concepts for natural languages. A theoretical reconstruction of Carnap’s explication of the mentioned concepts in the theory of meaning for natural languages is carried out. The connection of Carnap’s approach with the perspective of contemporary formal semantics is established. Subsequently, problematic cases and the difficulties they pose for Carnap’s concept are examined. An explanation is proposed for analytical truths as containing in their logical form an (unpronounced) quantifier over possible worlds (situations). (shrink)

What is philosophy? How should we do it? Why should we bother to? These are the kinds of questions addressed by metaphilosophy - the philosophical study of the nature of philosophy itself. Students of philosophy today are faced with a confusing and daunting array of philosophical methods, approaches and styles and also deep divisions such as the notorious rift between analytic and Continental philosophy. This book takes readers through a full range of approaches - analytic versus Continental, scientistic versus (...) humanistic, 'pure' versus applied - enabling them to locate and understand these different ways of doing philosophy. Clearly and accessibly written, it will stimulate reflection on philosophical practice and will be invaluable for students of philosophy and other philosophically inclined readers. (shrink)

This article mounts a defence of Floridi’s theory of strongly semantic information against recent independent objections from Fetzer and Dodig-Crnkovic. It is argued that Fetzer and Dodig-Crnkovic’s objections result from an adherence to a redundant practice of analysis. This leads them to fail to accept an informational pluralism, as stipulated by what will be referred to as Shannon’s Principle, and the non-reductionist stance. It is demonstrated that Fetzer and Dodig-Crnkovic fail to acknowledge that Floridi’s theory of strongly semantic information captures (...) one of our deepest and most compelling intuitions regarding informativeness as a basic notion. This modal intuition will be referred to as the contingency requirement on informativeness. It will be demonstrated that its clarification validates the theory of strongly semantic information as a novel, and non ad hoc solution to the Bar-Hillel-Carnap semantic paradox. (shrink)

One thing we have found out about logical empiricism, now that people are examining it more closely again, is that it was more a framework for a number of related views than a single doctrine. The pluralism of different approaches among various adherents to the Vienna and Berlin groups has been much emphasized. Some have gone so far as to suggest that the kind of speculative philosophy now often called "continental" (including, say, phenomenology) can be seen as falling within the (...) framework of views shared by the Vienna Circle. Much is made of Felix Kaufmann's membership in the Vienna Circle, for instance, or of its "Austrian" roots in the phenomenology of Brentano. (shrink)

The authors explore Carnap’s (1931) famous critique of Heidegger’s metaphysics and argue that, from the perspective of contemporary formal semantics of natural language, Carnap’s criticism is not convincing. Moreover, they provide direct empirical objections to Carnap’s criticism. In particular, using empirical evidence from languages like Russian that have negative concord, they show that Heidegger cannot be accused of assigning illegitimate logical forms to his sentences about Nothing because terms like “Nothing” can be used non-quantificationally and the fact that it is (...) not clear how their reference is established cannot be the reason why the corresponding sentences are ungrammatical (as Carnap seemed to suggest). The authors also critically discuss the view that natural language is insensitive to meaninglessness or contradiction. With reference to the work of J. Gajewsky, they show that this view is not true either. As a result of this investigation, they arrive at a position that an appeal to ungrammaticality like the one proposed by Carnap does not provide legitimate evidence against metaphysics. This conclusion relates to some recent criticism of the so-called non-analytical philosophers that can be traced back to Carnap’s paper. (shrink)

In 1929 Carnap gave a paper in Prague on Investigations in General Axiomatics; a briefsummary was published soon after. Its subject lookssomething like early model theory, and the mainresult, called the Gabelbarkeitssatz, appears toclaim that a consistent set of axioms is complete justif it is categorical. This of course casts doubt onthe entire project. Though there is no furthermention of this theorem in Carnap''s publishedwritings, his Nachlass includes a largetypescript on the subject, Investigations inGeneral Axiomatics. We examine this work here,showing (...) that it provides important insights intoCarnap''s development during this critical period, thetransition from Aufbau to Syntax,especially regarding the nature and motivation ofCarnap''s logicism. Moreover, we show how theAxiomatics influenced Carnap''s student Gödel inreaching the fundamental logical results that soonafterwards undermined Carnap''s project. (shrink)

This is an investigation of Aristotle's conception of accidental compounds (or "kooky objects," as Gareth Matthews has called them)—entities such as the pale man and the musical man. I begin with Matthews's pioneering work into kooky objects, and argue that they are not so far removed from our ordinary thinking as is commonly supposed. I go on to assess their utility in solving some familiar puzzles involving substitutivity in epistemic contexts, and compare the kooky object approach to more modern approaches (...) involving the notion of referential opacity. I conclude by proposing that Aristotle provides an implicit role for kooky objects in such metaphysical contexts as the Categories and Metaphysics. (shrink)

A major difficulty for currently existing theories of inductive inference involves the question of what to do when novel, unknown, or previously unsuspected phenomena occur. In this paper one particular instance of this difficulty is considered, the so-called sampling of species problem.The classical probabilistic theories of inductive inference due to Laplace, Johnson, de Finetti, and Carnap adopt a model of simple enumerative induction in which there are a prespecified number of types or species which may be observed. But, realistically, this (...) is often not the case. In 1838 the English mathematician Augustus De Morgan proposed a modification of the Laplacian model to accommodate situations where the possible types or species to be observed are not assumed to be known in advance; but he did not advance a justification for his solution. (shrink)