Historically, blatantly untrue and defamatory conspiracy theories had disastrous consequences for those who were portrayed in them as evil-doers. At the same time, conspiratorial agreements at the expense of the common good between powerful groups in society do exist and have occasionally been uncovered. Against this background, the article describes different ways in which critical theory has looked at conspiracies. First, an attempt is made to show that Max Horkheimer's notes on `rackets' are an ambitious but flawed attempt to theorize (...) conspiracy. It is argued that Horkheimer's theory is imbued by the very conspiracy thinking that he proposed to criticize. Second, the author suggests recovering Franz Neumann's concept of `political alienation' as a more appropriate starting point to think critically about the ethical and epistemological questions raised by conspiracy theories. (shrink)

) Modern theories of formal truth have traditionally been used to analyse semantic paradoxes, but their field of application goes well beyond this field to include ontological issues, Godel′s incompleteness phenomena, and the relationship between object language, meta language and reduction. All these fields have had new light sched upon them by studies on the theories of truth. In providing a first summary of the various approaches in this field the author documents their respective advantages and areas of application. The (...) emphasis here is on the axiomatic theories of truth developed by Cantini, Feferman, Friedman and the autor himself, which over the past ten years have increasingly gained ground over the semantic theories of Kripke et al. The book describes the way in which many of the aciomatic proposals are built up and expand on semantic theories. This ist the first time that the results in this field have been made accessible to readers in their larger context. The book deals in detail with the technical aspects and so is ideal as a point of entry into the vast array of literature on the metamathematics of this field. A key objective of the book is to extablish a connection between the latest theories of truth and the older constructions elaborated by Tarski. He made a number of important findings about the formal properties of truth back in the 1930s, but some of his constructions are now considered to be obsolete. Tarski′s views appear in a new light in this book since some of his ideas have only been formulated in recent years. (shrink)

Solutions to semantic paradoxes often involve restrictions of classical logic for semantic vocabulary. In the paper we investigate the costs of these restrictions in a model case. In particular, we fix two systems of truth capturing the same conception of truth: of the system KF of Feferman formulated in classical logic, and the system PKF of Halbach and Horsten, formulated in basic De Morgan logic. The classical system is known to be much stronger than the nonclassical one. We assess the (...) reasons for this asymmetry by showing that the truth theoretic principles of PKF cannot be blamed: PKF with induction restricted to non-semantic vocabulary coincides in fact with what the restricted version of KF proves true. (shrink)

Wittgenstein’s Whewell’s Court Lectures contains previously unpublished notes from lectures given by Ludwig Wittgenstein between 1938 and 1941. The volume offers new insight into the development of Wittgenstein’s thought and includes some of the finest examples of Wittgenstein’s lectures in regard to both content and reliability.

According to the disquotationalist theory of truth, the Tarskian equivalences, conceived as axioms, yield all there is to say about truth. Several authors have claimed that the expression of infinite conjunctions and disjunctions is the only purpose of the disquotationalist truth predicate. The way in which infinite conjunctions can be expressed by an axiomatized truth predicate is explored and it is considered whether the disquotationalist truth predicate is adequate for this purpose.

Definitional and axiomatic theories of truth -- Objects of truth -- Tarski -- Truth and set theory -- Technical preliminaries -- Comparing axiomatic theories of truth -- Disquotation -- Classical compositional truth -- Hierarchies -- Typed and type-free theories of truth -- Reasons against typing -- Axioms and rules -- Axioms for type-free truth -- Classical symmetric truth -- Kripke-Feferman -- Axiomatizing Kripke's theory in partial logic -- Grounded truth -- Alternative evaluation schemata -- Disquotation -- Classical logic -- Deflationism (...) -- Reflection -- Ontological reduction -- Applying theories of truth. (shrink)

If □ is conceived as an operator, i.e., an expression that gives applied to a formula another formula, the expressive power of the language is severely restricted when compared to a language where □ is conceived as a predicate, i.e., an expression that yields a formula if it is applied to a term. This consideration favours the predicate approach. The predicate view, however, is threatened mainly by two problems: Some obvious predicate systems are inconsistent, and possible-worlds semantics for predicates of (...) sentences has not been developed very far. By introducing possible-worlds semantics for the language of arithmetic plus the unary predicate □, we tackle both problems. Given a frame (W, R) consisting of a set W of worlds and a binary relation R on W, we investigate whether we can interpret □ at every world in such a way that □ $\ulcorner A \ulcorner$ holds at a world ᵆ ∊ W if and only if A holds at every world $\upsilon$ ∊ W such that ᵆR $\upsilon$ . The arithmetical vocabulary is interpreted by the standard model at every world. Several 'paradoxes' (like Montague's Theorem, Gödel's Second Incompleteness Theorem, McGee's Theorem on the ω-inconsistency of certain truth theories, etc.) show that many frames, e.g., reflexive frames, do not allow for such an interpretation. We present sufficient and necessary conditions for the existence of a suitable interpretation of □ at any world. Sound and complete semi-formal systems, corresponding to the modal systems K and K4, for the class of all possible-worlds models for predicates and all transitive possible-worlds models are presented. We apply our account also to nonstandard models of arithmetic and other languages than the language of arithmetic. (shrink)

It is shown that David Hilbert's formalistic approach to axiomaticis accompanied by a certain pragmatism that is compatible with aphilosophical, or, so to say, external foundation of mathematics.Hilbert's foundational programme can thus be seen as areconciliation of Pragmatism and Apriorism. This interpretation iselaborated by discussing two recent positions in the philosophy ofmathematics which are or can be related to Hilbert's axiomaticalprogramme and his formalism. In a first step it is argued that thepragmatism of Hilbert's axiomatic contradicts the opinion thatHilbert style (...) axiomatical systems are closed systems, a reproachposed by Carlo Cellucci. In the second section the question isdiscussed whether Hilbert's pragmatism in foundational issuescomes close to an a-philosophical ``naturalism in mathematics'' assuggested by Penelope Maddy. The answer is ``no'', because forHilbert philosophy had its specific tasks in the general projectto found mathematics. This is illuminated in the concludingsection giving further evidence for Hilbert's foundationalapriorism by discussing his ``axiom of the existence of mind'' andrelating it to the ``one and only axiom'' of the German algebraistof logic, Ernst Schröder, postulating the inherence of signs onthe paper. (shrink)

At the centre of the traditional discussion of truth is the question of how truth is defined. Recent research, especially with the development of deflationist accounts of truth, has tended to take truth as an undefined primitive notion governed by axioms, while the liar paradox and cognate paradoxes pose problems for certain seemingly natural axioms for truth. In this book, Volker Halbach examines the most important axiomatizations of truth, explores their properties and shows how the logical results impinge on (...) the philosophical topics related to truth. In particular, he shows that the discussion on topics such as deflationism about truth depends on the solution of the paradoxes. His book is an invaluable survey of the logical background to the philosophical discussion of truth, and will be indispensable reading for any graduate or professional philosopher in theories of truth. (shrink)

The proof-theoretic results on axiomatic theories oftruth obtained by different authors in recent years are surveyed.In particular, the theories of truth are related to subsystems ofsecond-order analysis. On the basis of these results, thesuitability of axiomatic theories of truth for ontologicalreduction is evaluated.

The attempts to mitigate the unprecedented health, economic, and social disruptions caused by the COVID-19 pandemic are largely dependent on establishing compliance to behavioral guidelines and rules that reduce the risk of infection. Here, by conducting an online survey that tested participants’ knowledge about the disease and measured demographic, attitudinal, and cognitive variables, we identify predictors of self-reported social distancing and hygiene behavior. To investigate the cognitive processes underlying health-prevention behavior in the pandemic, we co-opted the dual-process model of thinking (...) to measure participants’ propensities for automatic and intuitive thinking vs. controlled and reflective thinking. Self-reports of 17 precautionary behaviors, including regular hand washing, social distancing, and wearing a face mask, served as a dependent measure. The results of hierarchical regressions showed that age, risk-taking propensity, and concern about the pandemic predicted adoption of precautionary behavior. Variance in cognitive processes also predicted precautionary behavior: participants with higher scores for controlled thinking (measured with the Cognitive Reflection Test) reported less adherence to specific guidelines, as did respondents with a poor understanding of the infection and transmission mechanism of the COVID-19 virus. The predictive power of this model was comparable to an approach (Theory of Planned Behavior) based on attitudes to health behavior. Given these results, we propose the inclusion of measures of cognitive reflection and mental model variables in predictive models of compliance, and future studies of precautionary behavior to establish how cognitive variables are linked with people’s information processing and social norms. (shrink)

We investigate axiomatizations of Kripke's theory of truth based on the Strong Kleene evaluation scheme for treating sentences lacking a truth value. Feferman's axiomatization KF formulated in classical logic is an indirect approach, because it is not sound with respect to Kripke's semantics in the straightforward sense: only the sentences that can be proved to be true in KF are valid in Kripke's partial models. Reinhardt proposed to focus just on the sentences that can be proved to be true in (...) KF and conjectured that the detour through classical logic in KF is dispensable. We refute Reinhardt's Conjecture, and provide a direct axiomatization PKF of Kripke's theory in partial logic. We argue that any natural axiomatization of Kripke's theory in Strong Kleene logic has the same proof-theoretic strength as PKF, namely the strength of the system RA< ωω ramified analysis or a system of Tarskian ramified truth up to ωω. Thus any such axiomatization is much weaker than Feferman's axiomatization KF in classical logic, which is equivalent to the system RA<ε₀ of ramified analysis up to ε₀. (shrink)

(1984). Goodbye to the School System— Goodbye to the System of Leisure and Recreation? Aspects of the decay of the last dominant mode of socialisation at the levels of meaning and identity[1] Educational Studies: Vol. 10, No. 1, pp. 43-63.

This chapter discusses the complex conditions for the emergence of 19th-century symbolic logic. The main scope will be on the mathematical motives leading to the interest in logic; the philosophical context will be dealt with only in passing. The main object of study will be the algebra of logic in its British and German versions. Special emphasis will be laid on the systems of George Boole and above all of his German follower Ernst Schröder.

The book provides a thematic account of the changing political thought of critical theorists from Adorno to Habermas and Honneth. Its purpose is to establish the relevance of this tradition for contemporary political theory and philosophy.

Es vergeht kaum ein Monat, in dem nicht irgendwo auf dieser Welt ein neues Buch über Carl Schmitt erscheint. Warum also noch ein Buch? Betrachtet man die Sekundärliteratur, fällt auf, dass es so gut wie keine Monographie gibt, die Schmitts rechtswissenschaftliches Werk juristisch würdigt. Diese Lücke will die hier vorgelegte Untersuchung schließen, indem sie den eindeutigen Schwerpunkt auf seine Beiträge zum Staats- und Völkerrecht legt. Das erfordert die Untersuchung seiner Stellung im zeitgenössischen Schrifttum und die Klärung der Frage, ob einzelne (...) seiner Positionen und Begriffe noch heute in der Staatsrechtswissenschaft präsent sind. Erst in zweiter Linie werden seine Schriften zu den Grundlagenfächern Rechtstheorie und Rechtsphilosophie, Verfassungsgeschichte und allgemeine Staatslehre gewürdigt. Schmitts Arbeiten wollen immer auch Antworten auf aktuelle politische Herausforderungen geben. Deshalb kann auf die Thematisierung seiner Biographie und des zeitgeschichtlichen Hintergrunds nicht verzichtet werden. (shrink)

Culture is a uniquely human property. Although precursors to cultural practices are found in other animals, these precursors differ in kind from the conditions of human culture that have emerged through evolutionary processes. In order to illuminate the mutual dependence of biological-genetic and cultural evolution, the author investigates technology and the use of tools, as well as the way these abilities are transmitted, in order to understand what properties and abilities separate human beings from animals.

Over the past decades, we have witnessed calls for greater transdisciplinary engagement between scientific and societal actors to develop more robust answers to complex societal challenges. Although there seems to be agreement that these approaches might nurture innovations of a new kind, we know little regarding the research practices, their potential, and the limitations. To fill this gap, this article investigates a funding scheme in the area of transdisciplinary sustainability research. It offers a detailed analysis of the imaginaries and expectations (...) on which the funding scheme rests and how researchers actually practice transdisciplinarity within the respective projects. Identifying three ideal typical models of science–society relations at work, attention is paid to how, where, and when societal and scientific arenas get entangled. This article discusses the tensions between classical academic values and efforts to open research to society, the prevailing power structures that make societal participation challenging, the importance of place and technopolitical cultures, and how temporal project structures impede more radical openings to new ways of knowledge production. We finally emphasize that transdisciplinary knowledge production can only become a serious option for addressing societal challenges if broader changes are made to the knowledge regimes in place. (shrink)

We prove Yablo’s paradox without the diagonal lemma or the recursion theorem. Only a disquotation schema and axioms for a serial and transitive ordering are used in the proof. The consequences for the discussion on whether Yablo’s paradox is circular or involves self-reference are evaluated.

The article addresses the following question: if an extensive period of globalization and also democratization after the fall of the Berlin Wall has been followed by populism, does this mean that there is something wrong with liberalism itself? Must liberalism be substituted by alternative economic and political concepts? The article presents three alternatives to liberalism that are supposed to counter populism: a new communitarianism, a renewal of the democratic project as much as novel conceptions of social justice. However, it takes (...) also into account positions that address the current crisis from within the liberal framework itself. (shrink)

English summary: From an international and interdisciplinary viewpoint, Thomas Aquinas was the most important scholastic philosopher and theologian. His life, work and legacy are set out in this four section handbook which provides orientation in what is currently known about the man, his affinities and character, his work and its impact. The volume offers a summary of research up until now, as well as a basis for further investigation. Comprehensive indexes and literature sources mean it can be used as a (...) work of reference whose articles can be separately or integrally understood. Writing from their different perspectives, philosophy and history scholars along with Protestant and Catholic theologians all help paint this portrait from their different perspectives. German description: Das Thomas Handbuch bietet eine Darstellung von Leben, Werk und Wirkung von Thomas von Aquin, dem wohl bedeutendsten Vertreter der scholastischen Philosophie und Theologie in interdisziplinarer und internationaler Perspektive. In vier Sektionen enthalt es Ausfuhrungen zur Orientierung in der gegenwartigen Forschungslage, zur Person des Thomas und ihren Verbindungen und Pragungen, zu seinem Werk und zu seiner Wirkung. Es bietet eine Zusammenfassung der bisherigen Forschungen zu Thomas von Aquin und eine Grundlage fur weitere Arbeiten. Erschlossen durch umfassende Register und Literaturangaben, kann es als Nachschlagewerk genutzt werden, dessen einzelne Artikel je fur sich verstehbar sind, aber auch als umfassende Gesamtdarstellung. Die interdisziplinaren Beitrage eroffnen eine Gesamtschau, in welcher verschiedene Perspektiven ihren Ort finden und ihren je eigenen Beitrag zum Gesamten bieten. Mit Beitragen von: Henryk Anzulewicz, Carmela Baffioni, Michael Basse, David Berger, Inos Biffi, Volker Henning Drecoll, Mechthild Dreyer, Stephan Ernst, Sabine Folger-Fonfara, Elias Fullenbach, Ruedi Imbach, Ingo Klitzsch, Ulrich Kopf, Pieter de Leemans, Volker Leppin, Jurgen Miethke, Thomas Prugl, Francois-Xavier Putallaz, Reinhold Rieger, Philipp W. Rosemann, Marianne Schlosser, Gury Schneider-Ludorff, Rolf Schonberger, Christoph Schwobel, Notger Slenczka, Wolfgang Sturner, Hubert Philip Weber. (shrink)

Name der Zeitschrift: Das Mittelalter Jahrgang: 19 Heft: 1 Seiten: 125-145.

Seit Niccolo Machiavellis Principe (postum) im Jahre 1532 veroffentlicht worden ist, haben sich Generationen von Philosophen, Theologen und Historikern, aber auch von Politikern mit den Thesen des Florentiners auseinandergesetzt. Die Bucher zur Rezeption Machiavellis fullen inzwischen ganze Bibliotheken. Kann man heute - fast funfhundert Jahre spater - noch etwas Neues dazu beitragen? Vielleicht gelingt dies, indem der machiavellische Machtstaat aus interdisziplinarer Perspektive im Spiegel der Zeit beleuchtet wird. Die negative Sicht der Ratschlage Machiavellis an einen neuen Fursten ist mit dem (...) Begriff "Machiavellismus" gebrandmarkt worden. Die Frage, ob der Florentiner selbst ein Machiavellist war, ist heute freilich eher zu verneinen. Die mit dem Schlagwort verbundenen Vorurteile erweisen sich jedoch als resistent gegenuber jedem Gegenargument. Den unterschiedlichen, meist zeitbedingten Interpretationen der Lehre Machiavellis, mit denen der Interpret oft genug nur seine eigenen Anschauungen begrundet, soll in diesem Band nachgespurt werden. (shrink)

»On the Documentary« must be regarded as the last publication of the director, video artist and film thinker Harun Farocki. The observations contained in »Taking Pictures« see themselves as a commentary to this essay, which Farocki had to leave uncompleted. In addition to a reconstruction of the circumstances and background of Farocki's text, some of the characteristics of his perspective on the »documentary effect«, which can be explained most clearly with reference to spe cific camera gestures, are considered.