Frege, Misc

Bobzien’s reply to a defamatory blogpost on her essay ‘Frege plagiarized the Stoics’ in which she is accused among other things of plagiarism (!), and deliberate deception, and which contains a large number of falsehoods. (This reply is a minor contribution to the discussion of 'Frege plagiarized the Stoics', simply setting the record straight. It contains no important philosophical content whatsoever.).

Gottlob Frege was a complicated figure, and our engagement with his work ought to be correspondingly complicated. And that means, in part, admitting that his writings and intellectual activity addressed not only mathematical logic and philosophical semantics, but also (in his last years) legal and political philosophy, and even political theology. This side of Frege’s work—his late political thought, which engages eagerly with Germany’s mid-1920s fascist movement—has been politely but in fact irresponsibly ignored for too long by philosophers. The problem (...) is especially acute among analytic philosophers, who have yet to go through the “reckoning” process in relation to Frege that ‘Continental’ philosophers have gone through in relation to the revelations (or belatedly jogged memory) of Martin Heidegger’s affiliation with German fascism in 1933-45. (shrink)

Gottlob Frege (1848-1925) has been called ‘the undisputed father of analytic philosophy’ and ‘the most important logician since Aristotle.’ Even if his impact on philosophy were to extend no further than his decisive influence on leading early twentieth-century thinkers of the stature of Bertrand Russell, Ludwig Wittgenstein and Rudolf Carnap, that alone would assure him a notable place in the history of modern philosophy. Nevertheless, there are other areas of Frege’s intellectual activity that have largely escaped the attention of his (...) commentators. One of these is his seldom-noticed attempt late in life to write about political theology. In this reconstruction of Frege’s view, based on a context-sensitive close reading of his fragmentary writing on theology, I document Frege’s commitment to a highly politicized conception of theology’s public role. This conception is infused with the ideology of Germany’s Far-Right völkisch (pan-German ethnic-nationalist) movement and steeped in the political strife of early Weimar-era Germany. Frege’s interest in theology was evidently rooted not so much in conventionally spiritual concerns as in the decidedly innerweltlich desire to help turn the tide in German politics in favor of the ultranationalist Far Right. His theology was, accordingly, a political theology of völkisch, antisemitic, and anti-socialist nationalism. (shrink)

I critically discuss Dale Jacquette’s Frege: A Philosophical Biography. First, I provide a short overview of Jacquette’s book. Second, I evaluate Jacquette’s interpretation of Frege’s three major works, Begriffsschrift, Grundlagen der Arithmetik and Grundgesetze der Arithmetik; and conclude that the author does not faithfully represent their content. Finally, I offer some technical and general remarks.

This very brief paper provides plausible answers to the two residual questions that Jamie Tappenden states, but leaves unanswered, in his 2024 paper ‘Following Bobzien: Some notes on Frege’s development and engagement with his environment’, namely, why Frege read Sigwart’s Logik and what caused Frege to read Prantl.

European Journal of Philosophy, Volume 29, Issue 4, Page 988-1009, December 2021.

Frege says, at the end of a discussion of formalism in the Foundations of Arithmetic, that his own foundational program “could be called formal” but is “completely different” from the view he has just criticized. This essay examines Frege’s relationship to Hermann Hankel, his main formalist interlocutor in the Foundations, in order to make sense of these claims. The investigation reveals a surprising result: Frege’s foundational program actually has quite a lot in common with Hankel’s. This undercuts Frege’s claim that (...) his own view is completely different from Hankel’s formalism, and motivates a closer examination of where the differences lie. On the interpretation offered here, Frege shares important parts of the formalist perspective, but differs in recognizing a kind of content for arithmetical terms which can only be made available via proof from prior postulates. (shrink)

In his early work Hilbert puts forward the principle that in mathematics consistency is enough for existence. Moriconi (2003) claims that the standard understanding of Hilbert's contention is that he is assuming the completeness of his system. I look at the evidence for this interpretation and conclude that at the time he made this claim Hilbert had not yet developed a sophisticated conception of meta-mathematical concepts like consistency and completeness to allow him to formulate the completeness theorem. I then consider (...) how we should understand Hilbert's contention in light of this and suggest that, for Hilbert, consistency is conceptually prior to existence. On the basis of this I present a new reading of Hilbert's Principle which recovers Hilbert's true contention, and along with it the philosophical significance of Hilbert's early work which - in particular - provides a new approach to questions of ontology in mathematics. © 2017 Elsevier B.V., All rights reserved. (shrink)

In the section “Validity and Existence in Logik, Book III,” I explain Lotze’s famous distinction between existence and validity in Book III of Logik. In the following section, “Lotze’s Platonism,” I put this famous distinction in the context of Lotze’s attempt to distinguish his own position from hypostatic Platonism and consider one way of drawing the distinction: the hypostatic Platonist accepts that there are propositions, whereas Lotze rejects this. In the section “Two Perspectives on Frege’s Platonism,” I argue that this (...) is an unsatisfactory way of reading Lotze’s Platonism and that the Ricketts-Reck reading of Frege is in fact the correct way of thinking about Lotze’s Platonism. (shrink)

[ES] Gottlob Frege posiblemente era el primer filósofo analítico. La exégesis de su doctrina quedó durante varias décadas restringida casi naturalmente al ámbito de la filosofía analítica y angloparlante. El método que Frege heredó a la filosofía analítica se basa en el análisis abstracto y formal, y la aprehensión de su doctrina se desarrolló bajo el supuesto –tomado casi por autoevidente- que éste método es el único correcto para dar cuenta de los problemas filosóficos más fundamentales, muy particularmente el de (...) desarrollar una teoría de significado. Igualmente se asumía y asume todavía con cierto automatismo que las preocupaciones filosóficas de Frege son fundamentalmente las mismas de la filosofía analítica y las que no caben en este supuesto se desechan fácilmente como anacrónicas o absurdas. Este acercamiento al pensamiento de Frege exclusivamente bajo los supuestos de la filosofía analítica, sus méritos no obstante, no toma en cuenta el ambiente anti-naturalista y neo-kantiano en el cual Frege formó sus convicciones fundamentales. Algunos aspectos contenciosos como, por ejemplo, el principio de contexto, una posible jerarquía de sentidos indirectos o la suposición, casi tácita, de que la doctrina de Frege es una teoría sobre expresiones referenciales, aparecen en una luz diferente si nos damos cuenta de que su intento de construir un sistema es, en cuanto a filosofía, en el fondo una respuesta a problemas que Frege encontró en el sistema de Kant. [EN] Gottlob Frege was quite possibly the first analytical philosopher. For several decades the study of his teachings restricted itself almost naturally to the sphere of analytical and English speaking philosophy. The very method which Frege might have impressed upon analytical philosophy takes off with abstract and formal analysis and the apprehension of his doctrine developed under the assumption –taken to be almost self-evident- that this method is the only one capable of correctly accounting for the most fundamental philosophical problems, especially bringing forth a comprehensive theory of meaning. Hence it was taken for granted with certain automatism that the Frege´s philosophical worries were initially identical in its origins with those of contemporary analytical philosophy and those not amenable to easy adoptions are discharged as absurd anachronisms when viewed against current doctrines. Approaching Fregean thought exclusively under the assumptions of analytical philosophy, while having merit, does not take into account the anti-naturalist and neo-Kantian background which influenced the modelling of Frege’s fundamental convictions. Some contentious aspects like for example the context principle, a possible hierarchy of indirect senses or the almost tacit assumption that Frege’s doctrine is a theory about referential expressions appear in a different light, once we become aware that his attempt at system-construction, as far as it concerns philosophy, is fundamentally an answer to problems which Frege found in Kant’s system. (shrink)

[ES] El logicismo de Frege o, en términos más generales, su esfuerzo por construir un fundamento de razonamiento deductivo para las matemáticas fue motivado por el deseo de combatir el empirismo radical que empezaba a dominar la discusión científica en las tierras de habla alemana después de la muerte de Hegel. El objetivo similar de Russell unas décadas después, en cambio, se debe en su origen preponderantemente al deseo de superar el neohegelianismo de Bradley. El joven Wittgenstein formuló a partir (...) de lo que aprendió de ambos el sistema del Tractatus, rechazando algunos aspectos claves de uno y otro. Hay, por consiguiente, incompatibilidades importantes entre las tres propuestas de solución para los problemas relacionados con el concepto de la verdad y de la relación que debemos suponer que existe entre mundo, lenguaje y pensamiento. Si sus reflexiones se comparan con el manejo de preguntas aproximadamente equivalentes hoy en día, en particular a raíz del concepto semántico de la verdad que debemos a Tarski, nos podemos dar cuenta que hemos logrado una enorme flexibilidad en el manejo de los lenguajes simbólicos; a este dominio técnico de las herramientas que nos dio la formalización de la lógica simbólica debemos, entre otros avances, el Internet y los teléfonos inteligentes. En cambio, se perdió de vista la profundidad filosófica que estuvo en su origen, y, se podría decir, algo de lo filosófico de la filosofía. El brillo intenso de las tecnologías nuevas junto con la sensación de que tenemos a nuestra disposición una jerarquía infinita de lenguajes o metalenguajes, que nos permiten manejar cualquier problema heredado del nivel anterior, hacen que nos parezca superflua la ocupación con cuestiones más propiamente filosóficas como las entendían los primeros proponentes de la filosofía analítica. Es en parte a esta pérdida de sentido filosófico del quehacer del filósofo que se deben otros fenómenos que hablan de la trivialización de la filosofía: someter esta actividad en el marco académico a una medición cuantitativa que produce un diluvio de trabajos perfectamente inútiles, o la confusión de la filosofía con la elaboración de reglas operativas para hospitales. [EN] Frege’s logicism or, more generally, his efforts to construct a foundation for mathematics based on deductive reasoning was motivated by his wish to fight the radical empiricism that began to dominate scientific argument in German speaking countries after Hegel’s death. Russell’s similar purpose a few decades later, on the other hand, was originally due mainly to their wish to overcome Bradley’s neo-Hegelianism. Young Wittgenstein forged the system of the Tractatus drawing from his knowledge of both, refuting some key aspects of one or other. There are therefore important incompatibilities between the three proposed solutions for the problems related to the concept of truth and to the relation we must suppose exists between world, language and thought. When we compare their thoughts to today’s ways of handling questions which are approximately equivalent, particularly in the wake of the semantic concept of truth we owe to Tarksi, we may become aware that we have certainly gained enormous flexibility in the handling of symbolic languages; the Internet and intelligent telephones, among other signs of progress would have been impossible without this technical mastery of tools we obtained thanks to the formalization of symbolic logic. But, on the other hand, we also lost view of the philosophical depth that stood at its cradle and, it might be said, a bit of what makes philosophy philosophical. The intense sparkle of the new technologies together with the impression that we have an infinite hierarchy of languages or metalanguages at our disposal which allow us to handle any problem inherited from the previous level, may give us the impression that questions related to more deeply philosophical problems, such as the first proponents of analytical philosophy tried to deal with, are idle. Other phenomena which bear witness to the trivialization of philosophy are in part due to this loss of philosophical meaning of the business of philosophy: subduing this activity within the academic framework to methods of quantification which result in a deluge of perfectly useless publications, or the confusion of philosophy with the elaboration of operating rules for hospitals. (shrink)

In early analytic philosophy, one of the most central questions concerned the status of arithmetical objects. Frege argued against the popular conception that we arrive at natural numbers with a psychological process of abstraction. Instead, he wanted to show that arithmetical truths can be derived from the truths of logic, thus eliminating all psychological components. Meanwhile, Dedekind and Peano developed axiomatic systems of arithmetic. The differences between the logicist and axiomatic approaches turned out to be philosophical as well as mathematical. (...) In this paper, I will argue that Dedekind’s approach can be seen as a precursor to modern structuralism and as such, it enjoys many advantages over Frege’s logicism. I also show that from a modern perspective, Frege’s criticism of abstraction and psychologism is one-sided and fails against the psychological processes that modern research suggests to be at the heart of numerical cognition. The approach here is twofold. First, through historical analysis, I will try to build a clear image of what Frege’s and Dedekind’s views on arithmetic were. Then, I will consider those views from the perspective of modern philosophy of mathematics, and in particular, the empirical study of arithmetical cognition. I aim to show that there is nothing to suggest that the axiomatic Dedekind approach could not provide a perfectly adequate basis for philosophy of arithmetic. (shrink)

On the background of explaining their different notions of analyticity, their different views on definitions, and some aspects of Frege’s notion of sense, three important Kantian strands that interweave into Frege’s view are exposed. First, Frege’s remarkable view that arithmetic, though analytic, contains truths that “extend our knowledge”, and by Kant’s use of the term, should be regarded synthetic. Secondly, that our arithmetical (and logical) knowledge depends on a sort of a capacity to recognize and identify objects, which are given (...) us in particular ways, constituting their senses (Sinne). Third, that there is a sense in which Frege’s view of definitions and explications gives new substance to Kant’s leading idea of analyticity, namely, the containment of a truth or a concept in another. In all these, Frege’s view does not endorse the Kantian strands as they are, but gives them special and sometimes quite sophisticated twists. (shrink)

The received view has it that analytic philosophy emerged as a rebellion against the German Idealists (above all Hegel) and their British epigones (the British neo-Hegelians). This at least was Russell’s story: the German Idealism failed to achieve solid results in philosophy. Of course, Frege too sought after solid results. He, however, had a different story to tell. Frege never spoke against Hegel, or Fichte. Similarly to the German Idealists, his sworn enemy was the empiricism (in his case, John Stuart (...) Mill). Genealogically, this stance is not difficult to explain. Frege grew up as a philosopher in the context of the German Idealists. He was a member of Karl Snell’s “Sunday Circle” of university teachers in Jena. The group was influenced with Schelling and the German romanticists. The first Anglophone scholar to point out what Frege's thought owes to nineteenth-century Germany philosophy, Hans Sluga, argued that Frege followed the philosophical-logical tradition originating with Leibniz and Kant which Trendelenburg and Lotze developed significantly. About the same time, a philosophical historian writing in German, Gottfried Gabriel, did much to bring this tradition to light, casting Frege as neo-Kantian. Advancing beyond Sluga and Gabriel, the present paper reveals that through the mediation of Trendelenburg and especially of Lotze many elements of German idealism found their way into Frege's logic and philosophy. (shrink)

Frege and Peano started in 1896 a debate where they contrasted the respective conceptions on the theory and practice of mathematical definitions. Which was (if any) the influence of the Frege-Peano debate on the conceptions by the two authors on the theme of defining in mathematics and which was the role played by this debate in the broader context of their scientific interaction?

By drawing attention to these facts and to the relationship between Cantor’s and Husserl's ideas, I have tried to contribute to putting Frege's attack on Husserl "in the proper light" by providing some insight into some of the issues underling criticisms which Frege himself suggested were not purely aimed at Husserl's book. I have tried to undermine the popular idea that Frege's review of the Philosophy of Arithmetic is a straightforward, objective assessment of Husserl’s book, and to give some specific (...) reasons for thinking that the uncritical reading of Frege's review has unfairly distorted philosophers' perception of a work they do not know very well. (shrink)

English title: The Problem of the Synthetic a priori Judgements According to Hermann Lotze. The present article compares Kant’s and Lotze’s concepts of synthetic judgements. Lotze’s aim is a renewing of the Kant’s solutions, what he achieves thanks to introduction of the distinction between analytic (identical) content and synthetic form of these judgements which Kant recognised as synthetic. This distinction makes possible to lay down the concept of intentional sense which has influence over Frege and Husserl.

Gottlob Frege criticized Kant's use of the term "representation" in a footnote in the Foundations of Arithmetics. According to Frege, Kant used the term "representation" for mental images, which are private and incommunicable, and also for objects and concepts. Kant thereby gave "a strongly subjectivistic and idealistic coloring" to his thought. The paper argues that Kant avoided the kind of subjectivism and idealism which Frege hints in his remark. For Kant, having "Vorstellungen" requires the capacity of synthesis, by virtue of (...) which the mind goes beyond its subjective states, and its modifications become presentations of an independent world. (shrink)

This classic paper presents a realist but non-Platonist view of (whole) numbers. A number is "a special sort of relation which holds between aggregates and properties that pick out parts of those aggregates. For example, in claiming that a certain aggregate x contains 52 cards we are claiming that the numerical relation 52 holds between the aggregate x and the property of 'being a card'." This is a revival of John Stuart Mill's view, and the paper responds to Frege's arguments (...) that such a realist view of numbers is not possible. Kessler's view of numbers has been adopted by later Aristotelian realist philosophers of mathematics, such as Peter Forrest and D.M. Armstrong in 'The nature of number', and James Franklin in An Aristotelian Realist Philosophy of Mathematics. (shrink)

Gottlob Frege and Ludwig Wittgenstein (the later Wittgenstein) are often seen as polar opposites with respect to their fundamental philosophical outlooks: Frege as a paradigmatic "realist", Wittgenstein as a paradigmatic "anti-realist". This opposition is supposed to find its clearest expression with respect to mathematics: Frege is seen as the "arch-platonist", Wittgenstein as some sort of "radical anti-platonist". Furthermore, seeing them as such fits nicely with a widely shared view about their relation: the later Wittgenstein is supposed to have developed his (...) ideas in direct opposition to Frege. The purpose of this paper is to challenge these standard assumptions. I will argue that Frege's and Wittgenstein's basic outlooks have something crucial in common; and I will argue that this is the result of the positive influence Frege had on Wittgenstein. (shrink)

This paper presents a passage on truth from "Der Gedanke" and comments on its content and use in the classroom.

A summary of the philosophical career and intellectual contributions of Gottlob Frege (1848–1925), including his invention of first- and second-order quantified logic, his logicist understanding of arithmetic and numbers, the theory of sense (Sinn) and reference (Bedeutung) of language, the third-realm metaphysics of “thoughts”, his arguments against rival views, and other topics.

Queremos neste ensaio caracterizar de modo introdutório o essencial do legado de Gottlob Frege para a Filosofia da Linguagem contemporânea, identificando e caracterizando os traços distintivos mais genéricos de uma teoria do significado (ou conteúdo semântico) inspirada nas suas ideias seminais e contrastando-a com outras concepções actuais influentes acerca do significado, em especial as posições sobre o conteúdo singular (conteúdo expresso por nomes próprios e outros termos singulares) remotamente inspiradas em ideias de John Stuart Mill.

O presente manual tem como intenção constituir um guia para uma disciplina introdutória de filosofia da linguagem. Foi elaborado a partir da leccionação da disciplina de Filosofia da Linguagem I na Faculdade de Letras da Universidade do Porto desde 2001. A disciplina de Filosofia da Linguagem I ocupa um semestre lectivo e proporciona aos estudantes o primeiro contacto sistemático com a área da filosofia da linguagem. Pretende-se que este manual ofereça aos estudantes os instrumentos necessários não apenas para acompanhar uma (...) iniciação ao campo da filosofia da linguagem mas também para o estudo e a investigação autónomos posteriores. Para isso é percorrido um trajecto que conduz das intuições pré-teóricas acerca de linguagem, de que todos dispomos, até um conhecimento disciplinar específico, histórico e temático, da filosofia da linguagem. Em termos práticos, são considerados como precedentes da disciplina de Filosofia da Linguagem I – mesmo se, pelo existem actualmente precedências em sentido estrito – as disciplinas de Lógica I e II e de Filosofia do Conhecimento I e II. Os programas dessas disciplinas nos últimos anos estiveram presentes por trás da elaboração do manual. (shrink)

Gottlob Frege (1848-1925) has been called ‘the undisputed father of analytic philosophy’ and ‘the most important logician since Aristotle.’ Even if his impact on philosophy were to extend no further than his decisive influence on leading early twentieth-century thinkers of the stature of Bertrand Russell, Ludwig Wittgenstein and Rudolf Carnap, that alone would assure him a notable place in the history of modern philosophy. Nevertheless, there are other areas of Frege’s intellectual activity that have largely escaped the attention of his (...) commentators. One of these is his seldom-noticed attempt late in life to write about political theology. In this reconstruction of Frege’s view, based on a context-sensitive close reading of his fragmentary writing on theology, I document Frege’s commitment to a highly politicized conception of theology’s public role. This conception is infused with the ideology of Germany’s Far-Right völkisch (pan-German ethnic-nationalist) movement and steeped in the political strife of early Weimar-era Germany. Frege’s interest in theology was evidently rooted not so much in conventionally spiritual concerns as in the decidedly innerweltlich desire to help turn the tide in German politics in favor of the ultranationalist Far Right. His theology was, accordingly, a political theology of völkisch, antisemitic, and anti-socialist nationalism. (shrink)

This paper presents a passage on truth from "Der Gedanke" and comments on its content and use in the classroom.

Gottlob Frege’s conception of works of art has received scant notice in the literature. This is a pity since, as this paper undertakes to reveal, his innovative philosophy of language motivated a theoretically and historically consequential, yet unaccountably marginalized Wittgenstinian line of inquiry in the domain of aesthetics. The element of Frege’s approach that most clearly inspired this development is the idea that only complete sentences articulate thoughts and that what sentences in works of drama and literary art express are (...) ‘mock thoughts’ (Schiengedanken). The early Wittgenstein closely followed Frege’s lead on this theme. One sees this, for example, in the Tractatus, where Wittgenstein announces that only sentential propositions model (‘picture’) states of affairs whereas works of art are objects we perceive sub specie aeternitatis (1961, 83). By the 1930s, however, Wittgenstein began to revise his view beyond his initial Frege-inspired standpoint. He came to insist that works of art can convey thoughts as well, but that thoughts do not model (picture) the world of facts and hence do not convey information about measurable objects and events. Rather, his contention was that aesthetically configured thoughts that artworks communicate impart information about our perspective on reality and reconfigure our view of life. To be more explicit, successful (gelungene) or ‘good’ works of art (ibid.), in Wittgenstein’s view, can supply aesthetically instructive ‘gestures’ that open to living experience promising new ways of being. It is in this respect, he held, that artists ‘have something to teach’ (1980, 36). (shrink)

This paper contains a close analysis of Frege's proofs of the axioms of arithmetic §§70-83 of Die Grundlagen, with special attention to the proof of the existence of successors in §§82-83. Reluctantly and hesitantly, we come to the conclusion that Frege was at least somewhat confused in those two sections and that he cannot be said to have outlined, or even to have intended, any correct proof there. The proof he sketches is in many ways similar to that given in (...) Grundgesetze der Arithmetik, but fidelity to what Frege wrote in Die Grundlagen and in Grundgesetze requires us to reject the charitable suggestion that it was this (beautiful) proof that he had in mind in §§82-83. (shrink)

Analytical philosophy of the last one hundred years has been heavily influenced by a doctrine to the effect that one can arrive at a correct ontology by paying attention to certain superficial (syntactic) features of first-order predicate logic as conceived by Frege and Russell. More specifically, it is a doctrine to the effect that the key to the ontological structure of reality is captured syntactically in the ‘Fa’ (or, in more sophisticated versions, in the ‘Rab’) of first-order logic, where ‘F’ (...) stands for what is general in reality and ‘a’ for what is individual. Hence “f(a)ntology”. Because predicate logic has exactly two syntactically different kinds of referring expressions—‘F’, ‘G’, ‘R’, etc., and ‘a’, ‘b’, ‘c’, etc.—so reality must consist of exactly two correspondingly different kinds of entity: the general (properties, concepts) and the particular (things, objects), the relation between these two kinds of entity being revealed in the predicate-argument structure of atomic formulas in first-order logic. (shrink)