Due to their acceptance of the verifiability principle, the only way left for logical positivists to argue for the meaningfulness of religious language was to accept some sort of emotivistic conception of it or to reduce it to the description of religious attitude. The verifiability principle, however, suffers from some severe limitations that make it inadequate as a criterion for cognitive meaning. To resolve these problems, logical positivists gave up the requirement of conclusive verifiability and defended a sort (...) of ‘liberalization’ of the verifiability principle. Carnap’s confirmability criterion for cognitive meaning, which is a liberalized form of the verifiability principle, is compatible with an orthodox conception of religious language since, from a theistic perspective, the existence of God can be confirmed through our observational statements. (shrink)

This volumes aim is to provide an introduction to Carnaps book from a historical and philosophical perspective, each chapter focusing on one specific issue. The book will be of interest not only to Carnap scholars but to all those interested in the history of analytical philosophy.

This book is a major contribution to the history of analytic philosophy in general and of logical positivism in particular. It provides the first detailed and comprehensive study of Rudolf Carnap, one of the most influential figures in twentieth-century philosophy. The focus of the book is Carnap's first major work: Der logische Aufbau der Welt. It reveals tensions within the context of German epistemology and philosophy of science in the early twentieth century. Alan Richardson argues that (...) class='Hi'>Carnap's move to philosophy of science in the 1930s was largely an attempt to dissolve the tension in his early epistemology. This book fills a significant gap in the literature on the history of twentieth-century philosophy. It will be of particular importance to historians of analytic philosophy, philosophers of science, and historians of science. (shrink)

On 15 October 1959, Rudolf Carnap, a leading member of the recently founded Vienna Circle, came to lecture at the Bauhaus in Dessau, southwest of Berlin. Carnap had just finished his magnum opus, The Logical Construction of the World, a book that immediately became the bible of the new antiphilosophy announced by the logical positivists. From a small group in Vienna, the movement soon expanded to include an international following, and in the sixty years since has exerted a (...) powerful sway over the conduct of the philosophy of science as well as over wide branches of philosophy, economics, psychology, and physics. The site of Carnap’s lecture that day, the Dessau Bauhaus, was a stunning building designed by Walter Gropius and dedicated just three years earlier. Protected by its flat roof and glass walls, the artists, architects, weavers, and furniture designers had made the school a citadel of high modernism. It was here that Carnap addressed an enthusiastic audience on “Science and Life.” “I work in science,” he began, “and you in visible forms; the two are only different sides of a single life.”1 In this paper I will explore this “single life” of which the new philosophy and the new art were to be different facets; in the process, I hope to cast light on the shared modernist impulses that drove both disciplines in the interwar years. 1. Rudolf Carnap, lecture notes for his Bauhaus lecture, “Wissenschaft und Leben,” prepared 1 Oct. 1929 and delivered 15 Oct. 1929, transcription from shorthand by Gerald Heverly, Carnap Papers in the Archives of Scientific Philosophy, University of Pittsburgh Libraries, University of Pittsburgh , document RC 110-07-49. Quoted by permission of the University of Pittsburgh. All rights reserved. Translations are my own unless otherwise noted. Peter Galison is associate professor in the departments of philosophy and physics at Stanford University, where he co-chairs the program in the history of science. His primary interest is in the history and philosophy of experimentation, the subject of his How Experiments End and Big Science: The Growth of Large-Scale Research, edited with Bruce Hevly . His current project is entitled Image and Logic: The Material Culture of Modern Physics. (shrink)

Do the terms “logical positivism” and “logical empiricism” mark a philosophically real and significant distinction? There is, of course, no doubt that the first term designates the group of philosophers known as the Vienna Circle, headed by Moritz Schlick and including Rudolf Carnap, Herbert Feigl, Philipp Frank, Hans Hahn, Otto Neurath, Friedrich Waismann and others. What is debatable, however, is whether the name “logical positivism” correctly distinguishes their doctrines from related ones called “logical empiricism” (...) that emerged from the Berlin Society for Scientific Philosophy around Hans Reichenbach which included Walter Dubislav, Kurt Grelling, Kurt Lewin and a young Carl Gustav Hempel.1 The .. (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)

Rudolf Carnap's Der logische Aufbau der Welt (The Logical Structure of the World) is generally conceived of as being the failed manifesto of logical positivism. In this paper we will consider the following question: How much of the Aufbau can actually be saved? We will argue that there is an adaptation of the old system which satisfies many of the demands of the original programme. In order to defend this thesis, we have to show how a (...) new 'Aufbau-like' programme may solve or circumvent the problems that affected the original Aufbau project. In particular, we are going to focus on how a new system may address the well-known difficulties in Carnap's Aufbau concerning abstraction, dimensionality, and theoretical terms. (shrink)

The author discusses how carnap, Schlick, And others attempted to derive logic from science and not philosophy. He explicates schlick's theory of verification, Carnap's protocol statements, And verifiability. In conclusion he shows how the positivists contend that the "rules of language will show what is verifiable." the implications this has for metaphysics will be discussed in part ii. (staff).

Carnap apparently never mentions August Comte’s name in his writings. Not that that is unusual. He seldom discusses individuals, or historical references of any sort. But you cannot evade context, and nothing comes from nothing. Merely allowing the name of “logical positivist” makes Comte a context for Carnap, which is hardly inappropriate, since Comte practically invented the idea of a “philosophy of science.” We can learn about the positivist mentality (for instance, how it is still with us) by searching (...) out the commonalities of positivism from Comte to Carnap. -/- Nietzsche and Heidegger are more explicit contexts for Carnap, as he refers to them and passes judgment on their work, especially in his 1931 paper, “Überwindung der Metaphysik durch Logische Analyse der Sprache.” Appearing in the logical-positivist organ Erkenntnis, it announces the “elimination” or “overcoming” of metaphysics by logical analysis, and became a foundational metaphilosophical text for what has come to be called “analytic” philosophy. -/- By setting Carnap in these three contexts—his positivism, his polemic with Heidegger, his reading of Nietzsche—I shall expose the presuppositions and intellectual limitations of Carnap’s approach to philosophy. Misreadings abound whenever he mentions Nietzsche or Heidegger, misreadings used to support the metaphilosophical myth of a woolly “continental” tradition in philosophy, distinct from the austere precision of “analysis.” The latter (the ur-form of “analytic” philosophy) is not just different from the “continental” metaphysics Carnap excoriates. It is better, more serious, intellectually clearer and cleaner. (shrink)

The logical empiricists often appear as a foil for feminist theories. Their emphasis on the individualistic nature of knowledge and on the value-neutrality of science seems directly opposed to most feminist concerns. However, several recent works have highlighted aspects of Carnap's views that make him seem like much less of a straightforwardly positivist thinker. Certain of these aspects lend themselves to feminist concerns much more than the stereotypical picture would imply.

Revision of the author's thesis--Oxford University, 1977. Bibliography: p.[142]-144.

This chapter provides a broadly sympathetic historical account of post-Kantian empiricist approaches to mathematics and logic. It focuses primarily but on John Stuart Mill’s radical empiricism and logical positivism, but also on Rudolf Carnap and Moritz Schlick. The later work of W. V. O. Quine is also treated.

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.

Between the two World Wars, Jørgen Jørgensen was a central figure in Danish philosophy and internationally recognized, as his teacher Harald Høffding had been before World War 1. When in the late 1920s Jørgensen established contact with the movement that would later be called logical positivism, he found a group of philosophers of his own age who advocated empiricism, the tools of formal logic and the Unity of Science, and who shared his anti-metaphysical approach to philosophy. He became (...) one of the movement’s organizers and wrote its history, but he was only for a short period influenced by especially Rudolf Carnap’s philosophy of logic. Although Jørgensen was never an uncritical member of the movement, he is often considered as a central representative of logical positivism in Scandinavia. (shrink)

[ Alan W. Richardson] This essay explores the uses that Michael Friedman and Bas van Fraassen have recently made of the work of Hans Reichenbach. It uses Friedman's work to complicate van Fraassen's invocation of Reichenbach's voluntarism in support of empiricism. It uses van Fraassen's work to motivate a concern with Friedman's neo-Kantian reading of Reichenbach. We are, finally, left with questions about the status and content of the account of the epistemic subject available to an epistemological voluntarist. /// [Thomas (...) E. Uebel] This response considers the question whether empiricists are condemned to silence about the epistemic agency their theories attribute or presuppose. It is argued that, unlike Reichenbach or Carnap, Neurath allowed for and indeed provided specifications of the role of epistemic agency in scientific inquiry. If this is correct, it underscores once more the need to distinguish between the various strands of logical positivism which show different strengths and weaknesses. (shrink)

These essays originated from an international conference of the same name. The collection brings together philosophers and historians of philosophy for fruitful interchange to foster the current revival of interest in this important sector of 20th century philosophy. Contents: Empiricism: The Key Question, Wesley C. Salmon; Pragmatics and the Principle of Empiricism, Brian Skyrms; The Logic of 20th Century Empiricism, Joseph Hanna; Reduction Sentence "Meaning Postulates", James H. Fetzer; The Context of Justification, John Kekes; Logical Positivism and the (...) Demise of "Moral Science", Geoffrey Sayre-McCord; "The First Man who almost wholly understands me": Carnap, Dingler and Conventionalism; Conventionalism Reconsidered, Werner Diederick; Carnap's Scientific Realism: Irenic or Ironic?, Richard Creath; Idealism and the Aufbau, Alberto Coffa; The Neo-Kantian Origin of Hans Reichenbach's Principle of Induction, A. Kamlah. Co-published with the Center for Philosophy of Science. (shrink)

The received view on the development of the correspondence rules in Carnap’s philosophy of science is that at first, Carnap assumed the explicit definability of all theoretical terms in observational terms and later weakened this assumption. In the end, he conjectured that all observational terms can be explicitly defined in in theoretical terms, but not vice versa. I argue that from the very beginning, Carnap implicitly held this last view, albeit at times in contradiction to his professed position. To establish (...) this point I argue that, first, Carnap’s ‘Über die Aufgabe der Physik’ is a contribution to the philosophy of science of logical empiricism, contrary to Thomas Mormann and in agreement with Herbert Feigl. Second, Michael Friedman misunderstands the ‘Aufgabe’ with his claim that it describes a method for arriving at explicit definitions for theoretical terms. Another received view on Carnap’s philosophy of science is that it assumed a formalization of physical theories that was too detached from actual physics and thus justly disavowed in favor of the semantic view as, for example, developed by van Fraassen. But the ‘Aufgabe’ and related works including the Aufbau show that from the very beginning to his last works, Carnap suggested formalizing physical theories as restrictions in mathematical spaces, as in the state-space conception of scientific theories favored by van Fraassen. (shrink)

When ‘Freddy’ Ayer asked me to contribute to his volume in the Library of Living Philosophers series, I was delighted, and while the main topic of my contribution was the sense in which it can be a ‘necessary’ truth that water is H2O, I devoted a section of that essay to problems that I saw with Ayer's account of the paradigm intentional notion, the notion of reference. Ayer ended his reply by saying that he could not satisfactorily meet my objections, (...) and with characteristic modesty and good humour he added that it was only small consolation that, in his opinion, no one else could satisfactorily account for reference either. The thoughtfulness, fairness, and responsiveness of Ayer's entire reply reminded me of the way in which the same qualities were displayed in Carnap's reply to my contribution to his volume in the same series. These two replies—Carnap's and Ayer's—display the virtues of the philosopher who searches for truth, and who genuinely welcomes serious criticism, in a truly exemplary way. I treasure both of them, and they are bound up with my memories of those two wonderful philosophers. (shrink)

In this article, I consider the influence of the ideas of Ludwig Wittgenstein, and above all the ideas of his Tractatus Logico-Philosophicus on the philosophy of logical positivism. Agreeing that the question of such an influence is not a self-evident one, I clarify at first the concept of logical positivism and then turn to the evidence of the leading logical positivists about the influence of Wittgenstein upon them. An analysis of recollections of Moritz Schlick, Rudolf (...) Carnap, Otto Neurath, Friedrich Waismann, and Alfred Ayer suggests that at least these thinkers themselves considered such an influence as very significant. (shrink)

ABSTRACT Recent historical discussion of conceptual engineering by analytic philosophers has largely focused on precedents for contemporary conceptual engineering within the history of analytic philosophy. However, I suggest that we can and should look outside of the analytic tradition for further examples of conceptual engineering, and inspiration for further work in conceptual engineering. Here I will look to one such other tradition – American Black feminism. I do this by considering the work of Audre Lorde and Patricia Hill Collins in (...) tandem with a tradition that is the more usual stomping ground of analytic philosophers: logical positivism. I draw out Rudolf Carnap and Otto Neurath’s respective views on conceptual engineering, before turning to Collins and Lorde. I suggest that Collins on the power of self-definition provides a model of conceptual engineering that closely matches that given by Neurath, whilst we can read Lorde’s work on poetry as giving a distinctively individualist spin on the conceptual engineering. I conclude with a comparative discussion of the various models on offer, suggesting that rather than being in competition, these various views of conceptual engineering are best seen as a toolbox of methods for conceptual engineering. (shrink)

The verifiability principle was the characteristic claim of a group of thinkers who called themselves the Vienna Circle and who formed the philosophical movement now known as logical positivism. The verifiability principle is an empiricist criterion of meaning which declares that only statements that are verifiable by —i.e., logically deducible from— observational statements are cognitively meaningful. -/- This essay is a short introduction to the philosophical movement of logical positivism and its formulation of the verifiability principle. (...) Its primary aim is to provide students of philosophy with an accessible first overview of this philosophical movement. -/- After pointing out some aspects of the philosophical background of logical positivism (section 1), I will comment on the reasoning that lead these authors to formulate the verifiability principle (section 2), and I will analyse the debate about how to understand observational language and how observational statements (the so-called ‘protocol statements’) are verified (section 3). I will also comment on the two main consequences of accepting the verifiability principle: the conception of philosophy as the task of logical analysis and the project of unified science (section 4), and I will explain the different views on ethical language defended by logical positivists (section 5). I will end this essay by identifying the main problems of the verifiability principle and I will explain the core ideas of Carnap’s confirmability criterion, which attempts to resolve these problems (section 6 and 7). (shrink)

The present article purports to show that the protocol sentence debate, pursued by some leading members of the Vienna Circle in the mid-1930s, was essentially a controversy over the explanation and the real significance of the concept of truth. It is further shown that the fundamental issue underlying the discussions about the concept of truth was the relationship between form and content, as well as between logic/language and the world. R. Carnap was the philosopher who most explicitly and systematically attempted (...) to come to grips with this problem. It is shown that the form-content distinction pervades the three most important phases of Carnap's philosophical development: the structuralist (in Der logische Aufbau der Welt), the syntactical and the semantical. His final semantical stance is essentially determined by the concept of linguistic frameworks. The article purports to demonstrate that this concept cannot be dispensed with in philosophy, but that Carnap failed to work out its ontological implications. Finally, the concept of an internal ontology is briefly delineated. (shrink)

The logical empiricists often appear as a foil for feminist theories. Their emphasis on the individualistic nature of knowledge and on the value-neutrality of science seems directly opposed to most feminist concerns. However, several recent works have highlighted aspects of Carnap's views that make him seem like much less of a straightforwardly positivist thinker. Certain of these aspects lend themselves to feminist concerns much more than the stereotypical picture would imply.

Wittgenstein's conception of logical and conceptual truth is often thought to rival that of the logical positivists. This paper argues that there are important respects in which these conceptions complement each other. Analyticity, in the positivists' sense, coincides, not with Wittgenstein's notion of a grammatical proposition, but rather with his notion of a tautology. Grammatical propositions can usually be construed as analyticity postulates in Carnap's sense of the term. This account of grammatical and analytic propositions will be (...) illustrated by appeal to logical, conceptual and arithmetic truths. Its consequences for an analysis of corresponding modal notions will be indicated. (shrink)

This chapter contains sections titled: Introduction Carnap's Logical Positivism Quine's Naturalism The External/Internal Distinction and the Analytic/Synthetic Distinction The Indeterminacy of Translation Quine's Conception of Philosophy I: Metaphysics Quine's Conception of Philosophy II: Ontology Quine's Influence References.

Carnap and Twentieth-Century Thought: Explication as En lighten ment is the first book in the English language that seeks to place Carnap's philosophy in a broad cultural, political and intellectual context. According to the author, Carnap synthesized many different cur rents of thought and thereby arrived at a novel philosophical perspective that remains strik ing ly relevant today. Whether the reader agrees with Carus's bold theses on Carnap's place in the landscape of twentieth-century philosophy, and his even bolder (...) claims concerning the role that philosophy in Carnap's style should play in the thought of our century, does not matter so much as the excellent opportunity Carus's book offers to thoroughly rethink one's ideas about Carnap's philosophy. One reason why Carnap and Twentieth-Century Thought might change one's ideas is that Carus has unearthed much hitherto unknown material from the archives that sheds new light on Carnap's early life and thought. Indeed, the many archival findings presented in CTT for the first time suffice to make the book re warding reading for philosophers and historians of philosophy alike. CTT exhibits a high standard of historical scholarship, and the book itself is a beautiful example of high-quality academic publishing. Up to now, Carnap has remained a controversial figure on the philo sophical scene. On the one hand, he has a solid reputation as a leading figure of logical positivism . According to conventional wisdom, this was a school of thought characterized by its formal and technical philosophy, as well as being rather dismissive of other ways of doing philosophy, dogmatically sticking to its own theses. As a typical example of this arrogant logical empiricist attitude, one usually refers to Carnap's notorious Overcoming Metaphysics by Logical Analysis of Language , written when the Vienna Circle's Logical Empiricism had entered its most radical phase. Self-proclaimed postpositivist philosophers of science dismissed logical positivism, in particular Carnap's, as the dogmatic and orthodox “received view.” The tendency to portray logical empiricism as an obsolete doctrine centering around certain “dogmas” started with Quine's Two Dogmas of Empiricism and reached its somewhat ridiculous culmination in the early 1980s when allegedly “six or seven dogmas” were discovered . Thereby an allegedly un brid geable gap between classical “dogmatic” logical em pi ricism and its modern “enlightened” suc ces sors was construed. (shrink)

Moritz Schlick, Rudolf Carnap and Herbert Feig are the most prominent of the positivists to formulate views on the mind-body problem (aside from Hempel’s one-off treatment in 1935). While their views differed from each other and changed over time they were all committed to some form of scientific physicalism, though a linguistic or conceptual rather than ontological form of it. In focus here are their views during the heyday of logical positivism and its immediate aftermath, though some initial (...) scene-setting of Schlick’s and Carnap’s pre-positivist views will help to understand the final opposing positions of Carnap and Feigl. (shrink)

Carnap’s work was instrumental to the liberalization of empiricism in the 1930s that transformed the logical positivism of the Vienna Circle to what came to be known as logical empiricism. A central feature of this liberalization was the deployment of the Principle of Tolerance, originally introduced in logic, but now invoked in an epistemological context in “Testability and Meaning”. Immediately afterwards, starting with Foundations of Logic and Mathematics, Carnap embraced semantics and turned to interpretation to guide the (...) choice of a theoretical language for science. The first thesis of this paper is that recourse to an intended interpretation led to a partial retrenchment of the conventionalism implied by the Principle of Tolerance. It required that the choice of a language be based on abstraction from a context; this procedure later became a component of the process of explication that was distinctive to Carnap’s mature views. The interpretive origin of formal systems also ensured their likely syntactic consistency, an issue on which Carnap was strongly criticized by figures such as Beth and Gödel. The second thesis of this paper is that this reliance on an intended interpretation enabled constructed formal systems to be relevant to the development of empirical science. (shrink)

The present article-based dissertation is a contribution to a historical and systematic recon- struction of Paul Feyerabend’s philosophy. Building on previous work on the same subject, this thesis continues a research effort exploring Feyerabend’s early ties to scientific philoso- phy, in particular Logical Empiricism and the Vienna Circle, as well as its continued effects on Feyerabend’s later philosophy. The main claim is that Feyerabend’s formative years in Vienna (1946-1955) happened in the context of scientific philosophy and that his early (...) philosophi- cal proposals should be interpreted as a critical contribution within this tradition. Secondly, it proposes a framework to connect Feyerabend’s early and later philosophy and explain the theoretical change involved. -/- The first article gives the reader an overview of Feyerabend’s philosophy, introducing key themes of Feyerabend’s writings. -/- The second article deals with the context and interpretation of Feyerabend’s earliest extant essay (1948) and identifies an early stage of Feyerabend’s philosophical formation, possibly preceding his acquaintance with Logical Empiricism, in which positivism as a concept of ”philosophy of physicists” is his primary interest. This helps to build a very fine-grained time sequence of his early philosophical interests and helps to disentangle the notion of scientific philosophy. -/- The third article deals with an objection by Thomas Oberdan to the claim that Feyerabend’s pragmatic theory of observation is a development of earlier proposals by Rudolf Carnap, Otto Neurath and Karl Popper in the early 1930s. In particular, Oberdan denies that Carnap ever proposed such a theory about protocol sentences. The article argues that Oberdan’s objection fails by reconstructing how such a theory can be found in Carnap’s 1932 writings. Feyerabend’s pragmatic theory of observation is indeed one major point of contact between Logical Empiricism, Feyerabend’s early philosophy and his later ’post-positivist’ philosophy. This completes one main interpretative claim in previous work, namely, that Feyerabend’s pragmatic theory of observation should be seen as a contribution to the project of a ”behavioristics of scholars”. -/- The fourth and last article is dedicated to Feyerabend’s role as a protagonist in the so-called historical turn in the philosophy of science in the 1960s. His early strong opposition and his later adherence to the turn is discussed and an explanation of the change involved is given. To this end I introduce a reconstruction of Feyerabend’s metaphilosophy, a framework called Decision-based Epistemology, and claim that specific changes on the metaphilosophical level can account for prominent changes on the level of Feyerabend’s philosophical contributions. -/- An introduction at the beginning of the collection of articles gives a rationale of the outline, the overall research project and provides more informations on how these articles fit in the overall research project. (shrink)

David Lewis presented Convention as an alternative to the conventionalism characteristic of early-twentieth-century analytic philosophy. Rudolf Carnap is well known for suggesting the arbitrariness of any particular linguistic convention for engaging in scientific inquiry. Analytic truths are self-consistent, and are not checked against empirical facts to ascertain their veracity. In keeping with the logical positivists before him, Lewis concludes that linguistic communication is conventional. However, despite his firm allegiance to conventions underlying not just languages but also social customs, he (...) pioneered the view that convening need not require any active agreement to participate. Lewis proposed that conventions arise from “an exchange of manifestations of a propensity to conform to a regularity” (87–8). In reasserting the conventional quality of languages and other practices resting on mutual expectations, Lewis comfortably works within the analytic tradition. Yet he also deviates from his predecessors because his conventionalist approach is comprehensively grounded in instrumentalism. Lewis adopts an extension of David Hume's desire-belief psychology articulated in rational choice theory. He develops his philosophy of convention relying on the highly formal mid-twentieth-century expected utility and game theories. This attempt to account for language and social customs wholly in terms of instrumental rationality has the implication of reducing normativity to preference satisfaction. Lewis’ approach continues in the trend of undermining normative political philosophy because institutions and practices arise spontaneously, without the deliberate involvement of agents. Perhaps Lewis’ Convention is best seen as a resurgent form of analytic philosophy, characterized by “a style of argument, hostility to [ambitious] metaphysics, focus on language, and the dominance of logic and formalization” that solves the dilemma of “combining the analytic inheritance…with normative concerns” by reducing normativity to individuals’ preference fulfillment consistent with the axioms of rational choice. (shrink)

We compare Carnap's and Kuhn's views on science. Although there are important differences between them, the similarities are striking. The basis for the latter is a pragmatically oriented semantic conventionalist picture of science, which suggests that the view that post-positivist philosophy of science constitutes a radical revolution which has no interesting affinities with logical positivism must be seriously mistaken.

We compare Carnap's and Kuhn's views on science. Although there are important differences between them, the similarities are striking. The basis for the latter is a pragmatically oriented semantic conventionalist picture of science, which suggests that the view that post-positivist philosophy of science constitutes a radical revolution which has no interesting affinities with logical positivism must be seriously mistaken.

The important switch from the so-called old B-theory to the new tenseless theory of time (NTT), which had significant implications for the field of tense and indexicals, occurred after Carnap’s era. Against this new background, Carnap’s original inter-translatability thesis can no longer be upheld. The most natural way out would be to modify Carnap’s position according to the NTT; but this is not compatible with Carnap’s metaphysical neutrality thesis. Even worse, Carnap’s work on measurement theory can be used to develop (...) an argument in favour of the A-theory. I argue that there are tensed basic sentences which are needed in order to construct a tenseless system and thus cannot be translated without loss of meaning into tenseless ones (old B-theory) or made true by tenseless facts (NTT). (shrink)

Abstract. Value judgments are meaningless. This thesis was one of the notorious tenets of Carnap’s mature logical empiricism. Less well known is the fact that in the Aufbau values were con-sidered as philosophically respectable entities that could be constituted from value experiences. About 1930, however, values were banished to the realm of meaning-less me-taphysics, and Carnap came to endorse a strict emotivism. The aim of this paper is to shed new light on the question why Carnap abandoned his originally (...) positive attitude concerning values. It is argued that Carnap’s non-cognitivist attitude was the symptom of a deep-rooted and never properly dissolved tension be-tween his conflicting inclinations towards Neokantianism and Lebensphilosophie. In America Carnap’s non-cognitivism became a major obstacle for a closer collaboration between lo-gical empiricists and American pragmatists. Carnap’s persisting ad---herence to the dualism of practical life and theoretical science was the ultimate reason why he could not accept Morris’s and Kaplan’s pragmatist the-ses that cognitivism might well are compatible with a logical and empiricist scientific philosophy. (shrink)

Michael Friedman has recently argued that Carnap'sLogical Syntax of Language is fundamentally flawed in a way that reveals the ultimate failure of logical positivism. Friedman's argument depends crucially on two claims: (1) that Carnap was committed to the view that there is a universal metalanguage and (2) that given what Carnap wanted from a metalanguage, in particular given that he wanted a definition of analytic for an object language, he was in fact committed to a hierarchy of stronger (...) and stronger metalanguages. We argue that neither of these claims need be accepted. We show that there is no textual evidence for (1) and that if metalanguages are to be used for merely descriptive and not also justificatory purposes, Carnap does not need to define analyticity sufficiently for proving consistency, and so could have given a definition that does not entail a hierarchy of metalanguages. (shrink)

This article aims to give an overview of Carnap's 1928 book Logical Structure of the World or Aufbau and the most influential interpretations of its significance. After giving an outline of the book in Section 2 , I turn to the first sustained interpretations of the book offered by Goodman and Quine in Section 3 . Section 4 explains how this empirical reductionist interpretation was largely displaced by its main competitor. This is the line of interpretation offered by (...) Friedman and Richardson which focuses on issues of objectivity. In Section 5 , I turn to two more recent interpretations that can be thought of as emphasizing Carnap's concern with rational reconstruction. Finally, the article concludes by noting some current work by Leitgeb that aims to develop and update some aspects of the Aufbau project for contemporary epistemology. (shrink)

Several recent works in history and philosophy of science have re-evaluated the alleged opposition between the theses put forth by logical empiricists such as Carnap and the so-called "post-positivists", such as Kuhn. Although the latter came to be viewed as having seriously challenged the logical positivist views of science, recent authors maintain that some of the most notable theses of the Kuhnian view of science have striking similarities with some aspects of Carnap's philosophy. Against that reading, Oliveira (...) and Psillos argue that within Carnap's philosophy there is no place for the Kuhnian theses of incommensurability, holism, and theory-ladenness of observations. This paper presents each of those readings and argues that Carnap and Kuhn have non-opposing views on holism, incommensurability, the theory-ladenness of observations, and scientific revolutions. We note at the very end - without dwelling on the point, however - that they come apart on other matters, such as their views on metaphysics and on the context of discovery/justification distinction. (shrink)

Pondering the question of free will in the context of probability allows us to take a fresh look at a number of old problems. We are able to avoid deterministic entrapments and attempt to look at free will as an outcome of the entire decision-making system. In my paper, I will argue that free will should be considered in the context of a complex system of decisions, not individual cases. The proposed system will be probabilistic in character, so it will (...) be embedded in the calculus of probability. To achieve the stated goal, I will refer to two areas of Carnap’s interest: the relationship between free will and determinism, and the probability-based decision-making system. First, I will present Carnap’s compatibilist position. On this basis, I will show how free will can be examined on deterministic grounds. Then I will present Carnap’s probabilistic project—the so-called logical interpretation of probability. In addition to presenting its characteristics and functionality, I will argue for its usefulness in the context of decision analysis and its immunity to problems associated with determinism. Finally, I will show how the two mentioned elements can be combined, as a result of which I will present a concept for a probabilistic analysis of free will. In this context, I will identify free will with the individual characteristics of the system. My main aim is to present the theme of free will in the light of a formal analysis based on probability rather than metaphysical assumptions. (shrink)

Idealism is often associated with the kind of metaphysical system building which was successfully disposed of by logical positivism. As Hume's fork was intended to deliver a serious blow to Leibnizian metaphysics so logical positivism invoked the verificationist principle against the reawakening of metaphysics, in the tradition of German and British idealism. In the light of this one might reasonably wonder what Carnap's pragmatism could possibly have in common with Collingwood's idealism. After all, Carnap is (...) often seen as a champion of the logical positivist's critique of metaphysics, whilst Collingwood is renowned for his defence of the possibility of metaphysics against the attack to which Ayer subjected it. The answer is that they have more in common than one might suspect and that, once the relevant qualifications are made, there is as much convergence as there is contestation between Carnapian pragmatism and Collingwoodian idealism. (shrink)

A Critical Introduction to Philosophy of Language is a historically oriented introduction to the central themes in philosophy of language. Its narrative arc covers Locke's 'idea' theory, Mill's empiricist account of math and logic, Frege and Russell's development of modern logic and its subsequent deployment in their pioneering program of 'logical analysis', Ayer and Carnap's logical positivism, Quine's critique of logical positivism and elaboration of a naturalist-behaviorist approach to meaning, and later-Wittgenstein's 'ordinary language philosophy'-inspired (...) rejection of the project of logical analysis. Thus, it historically situates the two central programs in early twentieth-century English-speaking philosophy -- logical analysis and logical positivism -- and discusses the central critiques they face later in the century in the works of Quine and the later-Wittgenstein. Unlike other secondary studies in philosophy of language, A Critical Introduction to Philosophy of Language is not just a 'greatest hits album', i.e., a discontinuous compilation in which classics in the field are presented together with their standard criticisms one after the other. Instead, Fennell develops a particular, historical-thematic narrative in which the figures and ideas he treats are introduced in highly intentional ways. And by cross-referencing them throughout his discussions, he highlights the contributions they make to the narrative they comprise. (shrink)

Rudolf Carnap and W. V. Quine, two of the twentieth century's most important philosophers, corresponded at length—and over a long period of time—on matters personal, professional, and philosophical. Their friendship encompassed issues and disagreements that go to the heart of contemporary philosophic discussions. Carnap was a founder and leader of the logical positivist school. The younger Quine began as his staunch admirer but diverged from him increasingly over questions in the analysis of meaning and the justification of belief. That (...) they remained close, relishing their differences through years of correspondence, shows their stature both as thinkers and as friends. The letters are presented here, in full, for the first time. The substantial introduction by Richard Creath offers a lively overview of Carnap's and Quine's careers and backgrounds, allowing the nonspecialist to see their writings in historical and intellectual perspective. Creath also provides a judicious analysis of the philosophical divide between them, showing how deep the issues cut into the discipline, and how to a large extent they remain unresolved. (shrink)