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Jens Lemanski
Fernuniversität Hagen
  1.  28
    Language, Logic, and Mathematics in Schopenhauer.Jens Lemanski (ed.) - 2020 - Basel, Schweiz: Birkhäuser.
    The chapters in this timely volume aim to answer the growing interest in Arthur Schopenhauer’s logic, mathematics, and philosophy of language by comprehensively exploring his work on mathematical evidence, logic diagrams, and problems of semantics. Thus, this work addresses the lack of research on these subjects in the context of Schopenhauer’s oeuvre by exposing their links to modern research areas, such as the “proof without words” movement, analytic philosophy and diagrammatic reasoning, demonstrating its continued relevance to current discourse on logic. (...)
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  2.  28
    Euler-type Diagrams and the Quantification of the Predicate.Jens Lemanski - 2020 - Journal of Philosophical Logic 49 (2):401-416.
    Logicians have often suggested that the use of Euler-type diagrams has influenced the idea of the quantification of the predicate. This is mainly due to the fact that Euler-type diagrams display more information than is required in traditional syllogistics. The paper supports this argument and extends it by a further step: Euler-type diagrams not only illustrate the quantification of the predicate, but also solve problems of traditional proof theory, which prevented an overall quantification of the predicate. Thus, Euler-type diagrams can (...)
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  3.  15
    World and Logic.Jens Lemanski - 2021 - London, Vereinigtes Königreich: College Publications.
    What is the relationship between the world and logic, between intuition and language, between objects and their quantitative determinations? Rationalists, on the one hand, hold that the world is structured in a rational way. Representationalists, on the other hand, assume that language, logic, and mathematics are only the means to order and describe the intuitively given world. In World and Logic, Jens Lemanski takes up three surprising arguments from Arthur Schopenhauer’s hitherto undiscovered Berlin Lectures, which concern the philosophy of language, (...)
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  4.  25
    Calculus CL as a Formal System.Jens Lemanski & Ludger Jansen - 2020 - In Ahti Veikko Pietarinen, Peter Chapman, Leonie Bosveld-de Smet, Valeria Giardino, James Corter & Sven Linker (eds.), Diagrammatic Representation and Inference. Diagrams 2020. Lecture Notes in Computer Science, vol 12169. 2020. 93413 Cham, Deutschland: pp. 445-460.
    In recent years CL diagrams inspired by Lange’s Cubus Logicus have been used in various contexts of diagrammatic reasoning. However, whether CL diagrams can also be used as a formal system seemed questionable. We present a CL diagram as a formal system, which is a fragment of propositional logic. Syntax and semantics are presented separately and a variant of bitstring semantics is applied to prove soundness and completeness of the system.
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  5. Periods in the Use of Euler-Type Diagrams.Jens Lemanski - 2017 - Acta Baltica Historiae Et Philosophiae Scientiarum 5 (1):50-69.
    Logicians commonly speak in a relatively undifferentiated way about pre-euler diagrams. The thesis of this paper, however, is that there were three periods in the early modern era in which euler-type diagrams (line diagrams as well as circle diagrams) were expansively used. Expansive periods are characterized by continuity, and regressive periods by discontinuity: While on the one hand an ongoing awareness of the use of euler-type diagrams occurred within an expansive period, after a subsequent phase of regression the entire knowledge (...)
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  6.  23
    Extended Syllogistics in Calculus CL.Jens Lemanski - 2021 - Journal of Applied Logics 8 (2):557-577.
    Extensions of traditional syllogistics have been increasingly researched in philosophy, linguistics, and areas such as artificial intelligence and computer science in recent decades. This is mainly due to the fact that syllogistics is seen as a logic that comes very close to natural language abilities. Various forms of extended syllogistics have become established. This paper deals with the question to what extent a syllogistic representation in CL diagrams can be seen as a form of extended syllogistics. It will be shown (...)
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  7.  23
    Logik und Eristische Dialektik.Jens Lemanski - 2018 - In Daniel Schubbe & Matthias Koßler (eds.), Schopenhauer-Handbuch: Leben – Werk – Wirkung. Stuttgart, Deutschland: Springer. pp. 160-165.
    The paper examines Schopenhauer's logic lectures and the eristic dialectics of the manuscript remains in particular. The content of the logic lectures is briefly presented, then the characteristics are highlighted and finally Schopenhauer’s Euler diagrams are examined. The section on eristic dialectics summarizes the history of the text and its origin and reflects the content and order of the document.
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  8.  23
    Logic Diagrams, Sacred Geometry and Neural Networks.Jens Lemanski - 2019 - Logica Universalis 13 (4):495-513.
    In early modernity, one can find many spatial logic diagrams whose geometric forms share a family resemblance with religious art and symbols. The family resemblance these diagrams bear in form is often based on a vesica piscis or on a cross: Both logic diagrams and spiritual symbols focus on the intersection or conjunction of two or more entities, e.g. subject and predicate, on the one hand, or god and man, on the other. This paper deals with the development and function (...)
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  9.  32
    Oppositional Geometry in the Diagrammatic Calculus CL.Jens Lemanski - 2017 - South American Journal of Logic 3 (2):517-531.
    The paper presents the diagrammatic calculus CL, which combines features of tree, Euler-type, Venn-type diagrams and squares of opposition. In its basic form, `CL' (= Cubus Logicus) organizes terms in the form of a square or cube. By applying the arrows of the square of opposition to CL, judgments and inferences can be displayed. Thus CL offers on the one hand an intuitive method to display ontologies and on the other hand a diagrammatic tool to check inferences. The paper focuses (...)
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  10. Logikdiagramme Und Logikmaschinen Aus der Zittauer Schule Um Christian Weise.Jens Lemanski - 2019 - Neues Lausitzische Magazin 141 (1):39-57.
    A particularly promising trail on the search for forgotten logic diagrams leads to Upper Lusatia in the 17th century, more precisely to Christian Weise and his students. Samuel Grosser, who later became rector in Görlitz, and Johann Christian Lange, who later became professor of logic at the University of Gießen, are the most prominent to have published remarkable logic diagrams. Even more remarkable, however, is the fact that Lange's interest in these diagrams ultimately gave rise to the idea of building (...)
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  11.  27
    Calculus CL - From Baroque Logic to Artificial Intelligence.Jens Lemanski - 2020 - Logique Et Analyse 249:111-129.
    In the year 1714, Johann Christian Lange published a baroque textbook about a logic machine, supposed to simulate human cognitive abilities such as perception, judgement, and reasoning. From today’s perspective, it can be argued that this blueprint is based on an inference engine applied to a strict ontology which serves as a knowledge base. In this paper, I will first introduce Lange’s approach in the period of baroque logic and then present a diagrammatic modernization of Lange’s principles, entitled Calculus CL. (...)
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  12.  23
    Schopenhauer Diagrams for Conceptual Analysis.Michał Dobrzański & Jens Lemanski - 2020 - In Ahti Veikko Pietarinen, P. Chapman, Leonie Bosveld-de Smet, Valeria Giardino, James Corter & Sven Linker (eds.), Diagrammatic Representation and Inference. Diagrams 2020. Lecture Notes in Computer Science, vol 12169. Cham, Schweiz: pp. 281-288.
    In his Berlin Lectures of the 1820s, the German philosopher Arthur Schopenhauer (1788–1860) used spatial logic diagrams for philosophy of language. These logic diagrams were applied to many areas of semantics and pragmatics, such as theories of concept formation, concept development, translation theory, clarification of conceptual disputes, etc. In this paper we first introduce the basic principles of Schopenhauer’s philosophy of language and his diagrammatic method. Since Schopenhauer often gives little information about how the individual diagrams are to be understood, (...)
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  13.  5
    Schopenhauer’s Partition Diagrams and Logical Geometry.Jens Lemanski & Lorenz Demey - 2021 - In A. Basu, G. Stapleton, S. Linker, C. Legg, E. Manalo & P. Viana (eds.), Diagrams 2021: Diagrammatic Representation and Inference. 93413 Cham, Deutschland: pp. 149-165.
    The paper examines Schopenhauer’s complex diagrams from the Berlin Lectures of the 1820 s, which show certain partitions of classes. Drawing upon ideas and techniques from logical geometry, we show that Schopenhauer’s partition diagrams systematically give rise to a special type of Aristotelian diagrams, viz. (strong) α -structures.
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  14.  32
    Logic Diagrams in the Weigel and Weise Circles.Jens Lemanski - 2018 - History and Philosophy of Logic 39 (1):3-28.
    From the mid-1600s to the beginning of the eighteenth century, there were two main circles of German scholars which focused extensively on diagrammatic reasoning and representation in logic. The first circle was formed around Erhard Weigel in Jena and consists primarily of Johann Christoph Sturm and Gottfried Wilhelm Leibniz; the second circle developed around Christian Weise in Zittau, with the support of his students, particularly Samuel Grosser and Johann Christian Lange. Each of these scholars developed an original form of using (...)
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  15.  10
    Arthur Schopenhauer on Naturalness in Logic.Jens Lemanski & Hubert Martin Schüler - 2020 - In Language, Logic, and Mathematics in Schopenhauer. Cham, Schweiz: Birkhäuser. pp. 145-165.
    The question of naturalness in logic is widely discussed in today’s research literature. On the one hand, naturalness in the systems of natural deduction is intensively discussed on the basis of Aristotelian syllogistics. On the other hand, research on “natural logic” is concerned with the implicitly existing logical laws of natural language, and is therefore also interested in the naturalness of syllogistics. In both research areas, the question arises what naturalness exactly means, in logic as well as in language. We (...)
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  16.  1
    Making Sense of Schopenhauer's Diagram of Good and Evil.Jens Lemanski & Amirouche Moktefi - 2018 - In Stapleton G. Chapman P. (ed.), Diagrammatic Representation and Inference10th International Conference, Diagrams 2018, Edinburgh, UK, June 18-22, 2018, Proceedings. Cham, Schweiz: Springer. pp. 721-724.
    It is little known that Schopenhauer (1788–1860) made thorough use of Euler diagrams in his works. One specific diagram depicts a high number of concepts in relation to Good and Evil. It is, hence, uncharacteristic as logicians of that time seldom used diagrams for more than three terms (the number demanded by syllogisms). The objective of this paper is to make sense of this diagram by explaining its function and inquiring whether it could be viewed as an early serious attempt (...)
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  17.  23
    An Analogy Between Hegel's Theory of Recognition and Ficino's Theory of Love.Jens Lemanski - 2019 - British Journal for the History of Philosophy 27 (1):95-113.
    A widely debated question in current research centres on determining the precursors to G. W. F. Hegel's theory of recognition. Until now Fichte, Rousseau and Aristotle have been discussed. However, the present paper analyses a further surprising correspondence between Marsilio Ficino's theory of love and Hegel's theory of recognition. Here it is shown that Hegel studied Ficino in 1793 and that we can discover syntactical, semantical, and structural vestiges of Ficino's De amore II 8 in Hegel's early fragments on religion (...)
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  18. Schopenhauers Gebrauchstheorie der Bedeutung und das Kontextprinzip: Eine Parallele zu Wittgensteins ›Philosophischen Untersuchungen‹.Jens Lemanski - 2016 - Schopenhauer Jahrbuch 2016 (97):171-195.
    In previous research, Schopenhauer is regarded as a consistent representative of a classical picture theory of language. The paper shows, however, that Schopenhauer does not only present a use theory of meaning in his lectures on logic, but also justifies it with the help of the context principle. Furthermore, it is discussed to what extent Schopenhauer's use theory of meaning is similar to the semantic theory of Ludwig Wittgenstein and his successors.
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  19. Schopenhauer's World. The System of The World as Will and Presentation I.Jens Lemanski - 2017 - Schopenhaueriana. Revista Española de Estudios Sobre Schopenhauer 2:297–315.
    in recent years, the research on Schopenhauer has shown a change in the interpretation of his main work, «The World as Will and Presentation», from (1) a normative and linear instruction which guides the reader from idealism to mysticism, pessimism and nothingness to (2) value-free and independent descriptions of the world with all phenomena (like idealism, mysticism, nothingness etc.) in it. thus Schopenhauer’s main work has become an empirical or baconian approach—something like a «philosophical cosmography»—. this fundamental change of interpretation (...)
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  20.  16
    Galilei, Torricelli, Stahl – Zur Wissenschaftsgeschichte der Physik in der B-Vorrede zu Kants Kritik der reinen Vernunft.Jens Lemanski - 2016 - Kant Studien 107 (3):451-484.
    In the second preface to the Critique of Pure Reason, Kant claims that Galileo Galilei, Evangelista Torricelli and Georg Ernst Stahl caused a scientific revolution in experimental physics (B xii). In this paper, I advance the historical thesis that Kantʼs claim refers precisely to three passages from Discursus et demonstrationes mathematicae (Galilei), Lettera a Filaleti Di Timauro Antiate (Torricelli), and Beweiß von den Saltzen (Stahl). This historical thesis provides evidence for a newer systematic interpretation, which says that the topic of (...)
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  21.  12
    Discourse Ethics and Eristic.Jens Lemanski - 2022 - Polish Journal of Aesthetics 62:151-162.
    Eristic has been studied more and more intensively in recent years in philosophy, law, communication theory, logic, proof theory, and A.I. Nevertheless, the modern origins of eristic, which almost all current researchers see in the philosopher Arthur Schopenhauer, are considered to be a theory of the illegitimate use of logical and rhetorical devices. Thus, eristic seems to violate the norms of discourse ethics. In this paper, I argue that this interpretation of eristic is based on prejudices that contradict the original (...)
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  22.  14
    Calculus CL as Ontology Editor and Inference Engine.Jens Lemanski - 2018 - In P. Chapman, G. Stapleton, A. Moktefi, S. Perez-Kriz & F. Bellucci (eds.), Diagrammatic Representation and Inference10th International Conference, Diagrams 2018, Edinburgh, UK, June 18-22, 2018, Proceedings. Cham, Schweiz: Springer. pp. 752-756.
    The paper outlines the advantages and limits of the so-called ‘Calculus CL’ in the field of ontology engineering and automated theorem proving. CL is a diagram type that combines features of tree, Euler-type, Venn-type diagrams and squares of opposition. Due to the simple taxonomical structures and intuitive rules of CL, it is easy to edit ontologies and to prove inferences.
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  23. Die ›Evolutionstheorien‹ Goethes und Schopenhauers. Eine kritische Aufarbeitung des wissenschaftsgeschichtlichen Forschungsstandes.Jens Lemanski - 2016 - In Daniel Schubbe & Søren Fauth (eds.), Schopenhauer und Goethe: Biographische und philosophische Perspektiven. Hamburg, Deutschland: Meiner. pp. 247-299.
    This article compares the research literature published by Goethe and Schopenhauer on the subject of evolutionary theory. The metatheoretical thesis is supported that the results of any comparison between Schopenhauer or Goethe and a concrete theory of evolution always depend on three dimensions: 1. the scientific point of view of the comparative, 2. the meaning and definition of the central terms and 3. the selection of the analyzed primary literature. It is also argued that no previously published study was able (...)
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  24. Techniques of Bridging the Gulf: Dialectic and Reductionism in McDowell and Fichte.Jens Lemanski - 2020 - Edukacja Filozoficzna 69 (1):7-36.
    “Dialectic” has been a matter of growing interest in contemporary philosophy. The present article analyzes dialectical methods and positions them by reference to two paradigmatic texts of German idealism and analytic philosophy, i.e. J.G. Fichte’s Science of Knowing (1804) and J. McDowell’s Mind and World. Both dialectical approaches will be interpreted with regard to their contribution in the debate on reductionism and anti-reductionism: both Fichte and McDowell claim that philosophical positions and logical terms stand in a dualistic relationship to one (...)
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  25. Reism, Concretism and Schopenhauer Diagrams.Jens Lemanski & Michał Dobrzański - 2020 - Studia Humana 9 (3/4):104-119.
    Reism or concretism are the labels for a position in ontology and semantics that is represented by various philosophers. As Kazimierz Ajdukiewicz and Jan Woleński have shown, there are two dimensions with which the abstract expression of reism can be made concrete: The ontological dimension of reism says that only things exist; the semantic dimension of reism says that all concepts must be reduced to concrete terms in order to be meaningful. In this paper we argue for the following two (...)
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  26.  8
    A Diagrammatic Representation of Hegel’s Science of Logic.Jens Lemanski & Valentin Pluder - 2021 - In Stapleton G. Basu A. (ed.), Diagrams 2021: Diagrammatic Representation and Inference. 93413 Cham, Deutschland: Springer. pp. 255-259.
    In this paper, we interpret a 19th century diagram, which is meant to visualise G.W.F. Hegel’s entire method of the `Science of Logic' on the basis of bitwise operations. For the interpretation of the diagram we use a binary numeral system, and discuss whether the anti-Hegelian argument associated with it is valid or not. The reinterpretation is intended to make more precise rules of construction, a stricter binary code and a review of strengths and weaknesses of the critique.
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  27. ›Cur potius aliquid quam nihil‹ von der Frühgeschichte bis zur Hochscholastik.Jens Lemanski - 2013 - In Daniel Schubbe, Jens Lemanski & Rico Hauswald (eds.), Warum ist überhaupt etwas und nicht nichts? Wandel und Variationen einer Frage. Hamburg: Meiner. pp. 23–65.
    Inspired by various research results on the history of philosophy that have not yet been compiled, the paper pursues the thesis that the question "Why is there something rather than nothing" was formulated long before Leibniz. In reviewing this thesis, the 'fundamental question' is differentiated into two individual questions: "Why is there something at all" and 'Why isn't rather nothing?". On the basis of this systematic distinction, the paper examines the history of philosophy from early history to scholasticism with regard (...)
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  28. Means or End? On the Valuation of Logic Diagrams.Jens Lemanski - 2016 - Logic-Philosophical Studies 14:98-122.
    From the beginning of the 16th century to the end of the 18th century, there were not less than ten philosophers who focused extensively on Venn’s ostensible analytical diagrams, as noted by modern historians of logic (Venn, Gardner, Baron, Coumet et al.). But what was the reason for early modern philosophers to use logic or analytical diagrams? Among modern historians of logic one can find two theses which are closely connected to each other: M. Gardner states that since the Middle (...)
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  29.  86
    ショーペンハウアーにおける意味の使用理論と文脈原理 : ヴィトゲンシュタイン.Jens Lemanski - 2017 - ショーペンハウアー研究 = Schopenhauer-Studien 22:150-190.
    Japanese translation of ""Schopenhauers Gebrauchstheorie der Bedeutung und das Kontextprinzip. Eine Parallele zu Wittgensteins Philosophischen Untersuchungen". In: 97. Schopenhauer-Jahrbuch (2016), S. 29–51" by Tadahiro Oota (太田 匡洋 [訳]).
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  30.  10
    Aristoteles – Schopenhauer – Erdmann. Basistexte Zur Eristik: N. Gutenberg, M. Herberger and P. Riemer Editors. Berlin: Frank & Timme, 2020, 273 Pp. €29,80. ISBN 978-3-7329-0627-7. [REVIEW]Jens Lemanski - 2021 - History and Philosophy of Logic 42 (3):297-299.
    In recent years, previously unknown aspects of Arthur Schopenhauer's œuvre have increasingly become the focus of various research efforts. Examples of this are Schopenhauer's philosophy of language...
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  31.  15
    Die Neuaristotelischen Ursprünge des Kontextprinzips Und Die Fortführung in der Fregeschen Begriffsschrift.Jens Lemanski - 2013 - Zeitschrift für Philosophische Forschung 67 (4):566-586.
    Beginning with a research review, the present paper shows that Hans Slugaʼs and esp. Robert Brandomʼs thesis, according to which Frege has adopted the context-principle and the priority of propositional from Kant, can solve problems in current Frege scholarship, on the one hand, but is itself fraught with further problems, on the other hand. In contrast, this paper maintains that the context-principle and the priority of the propositional are implicitly present in Fregeʼs Begriffsschrift since both have not been taken over (...)
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  32.  28
    The Productive Ambiguity of Venn’s Three Circles.Jens Lemanski & Amirouche Moktefi - 2020 - In Kristof Nyiri, András Benedek & Petra Aczel (eds.), How Images Behave: 9th Budapest Visual Learning Conference, Budapest, 26 November 2020. Hungarian Academy of Sciences. pp. 245-248.
    It is not rare to meet in scientific literature with a figure made of three circles, intersecting in such a way as to delineate all the combinations of the components that they stand for. This figure is commonly known as a ‘Venn diagram’ or ‘Venn’s three circles’. In this paper, we argue that many so-called Venn diagrams found in modern scientific literature do not truly depict intersections, and hence, are not true Venn diagrams.
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  33.  44
    Problems and Interpretations of Schopenhauer’s World as Will and Representation.Jens Lemanski & Daniel Schubbe - 2019 - Voluntas: Revista Internacional de Filosofia 10 (1):199-211.
    In this paper we present an overview of the current interpretations of the first volume of Arthur Schopenhauer’s main work The World as Will and Representation (W I) and discuss their problems. We discuss four issues, which in our opinion must clarify a current interpretation implicitly or explicitly, if it claims to be an interpretation of the whole book: (1) What does Schopenhauer mean by the fact that his work shares only one (single) thought? (2) How are the individual books (...)
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  34.  25
    Die Königin der Revolution. Zur Rettung Und Erhaltung der Kopernikanischen Wende.Jens Lemanski - 2012 - Kant Studien 103 (4):448-471.
    The paper distinguishes three interpretations of Kant’s so called ‘Copernican Revolution’: an epistemological, a hermeneutical and a scientific-theoretical or methodological one. It is argued that the ‘scientific-theoretical reading’ can be based on new historical evidence. Kant borrowed the metaphors ‘army of stars’ (‘Sternenheer’) and ‘spectator’ (‘Zuschauer’) from Johann Heinrich Lambert and used them in a context similar to Lambert’s. This suggests that Kant’s formula “first thoughts of Copernicus” (“den ersten Gedanken des Copernicus”) refers, again following Lambert, to the first 9 (...)
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  35. Die Rationalität des Mystischen. Zur Entwicklung und Korrektur unseres Mystikverständnisses am Beispiel von Dionysius Areopagita, Gottfried Arnold und Arthur Schopenhauer'.Jens Lemanski - 2010 - Schopenhauer Jahrbuch 91:93-120.
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  36. Von Brucker Zu Augustinus: Probleme MIT der Geschichte des Begriffs >Neuplatonismus<.Jens Lemanski - 2011 - Archiv für Begriffsgeschichte 53:33-53.
    Normally in nowadays philosophical research the term 'Neoplatonism' is coined and it was used the first time by Jacob Brucker in the first half of the 18th century. But there are signs that the concept is much older. So this essay follows the trace of the term 'Neoplatonism' from german philosophical historians, like Büsching and Brucker, back to the Cambridge Platonists and tries to demonstrate that the origin of the concept is based on some texts of the late antiquity which (...)
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  37.  31
    Post-Truth as a Procrastination of Enlightenment.Jens Lemanski - 2018 - Studia Philosophica Estonica 11 (1):117-127.
    In recent years the cultural pessimistic position has become known, according to which we live in an “age of post-truth.” This thesis is supported by the observation of an increasing use of argumenta ad passiones in politics. In contrast to this view, I believe that “time” and “representation” play a more decisive role in individual post-truth arguments than the appeal to passiones. By analysing typical post-truth arguments, I arrive at a much more positive view on the present age: the designation (...)
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  38.  24
    The Cretan Square.Jean-Yves Beziau & Jens Lemanski - 2020 - Logica Universalis 14 (1):1-5.
    This special issue is related to the 6th World Congress on the Square of Opposition which took place at the Orthodox Academy of Crete in November 2018. In this introductory paper we explain the context of the event and the topics discussed.
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  39.  18
    An Introduction to Language, Logic and Mathematics in Schopenhauer.Jens Lemanski - 2020 - In Language, Logic, and Mathematics in Schopenhauer. Cham, Schweiz: pp. 1-15.
    This paper is an introduction to the volume Language, Logic and Mathematics in Schopenhauer. It shows the basic interpretations discussed in Schopenhauer’s research, explains the aims and tasks of Schopenhauer’s philosophy and shows the importance of language, logic and mathematics in Schopenhauer’s system.
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  40. Vom Alles zum Nichts oder die "Uberwindung des dogmatischen Spinozismus in der Ethik Schopenhauers.Jens Lemanski - 2009 - Schopenhauer Jahrbuch 90:19-44.
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  41.  4
    Thomas Lübbig, Rhetorik für Plädoyer und forensischen Streit. [REVIEW]Jens Lemanski - 2021 - Rechtsphilosophie. Zeitschrift Für Die Grundlagen des Rechts 7:326-333.
    Das hier zu besprechende Buch 'Rhetorik für Plädoyer und forensischen Streit' von T. Lübbig kündigt einen Beitrag im Bereich ‚Rhetorik und Recht‘ an, und dabei insbesondere eine Untersuchung zur Rhetorik in der juristischen Praxis.
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  42. Begriffsgeschwindigkeit und Gedankengeschwindigkeit.Jens Lemanski - 2011 - Internationale Zeitschrift Für Philosophie Und Psychosomatik 1.
    Das folgende Essay beschäftigt sich mit Zeitmetaphern im Erkenntnisakt. Durch eine historische Untersuchung von dialektischen Denkern der Antike wie Platon, Plotin und Porphyrius und der Neuzeit wie Fichte, Schopenhauer und Wittgenstein versucht es, die These Karl Poppers zu widerlegen, dass die Nachkonstruktion der Vorgänge bei der Auslösung eines Einfalls kein philosophisches Thema sei. Im Unterschied zu großen Teilen der modernen Philosophie zeigt die Philosophiegeschichte, dass Denken und Sprechen nicht unbedingt als identisch angesehen werden. Vielmehr zeigt sich eine Diskrepanz zwischen dem (...)
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  43. Concept Diagrams and the Context Principle.Jens Lemanski - 2020 - In Language, Logic, and Mathematics in Schopenhauer. Cham, Schweiz: Birkhäuser (Springer nature). pp. 47-73.
    What is the primacy of logic? Concepts, judgments, or inferences? Whereas representationalists traditionally argue for a primacy of the conceptual, rationalists, referring to the context principle and the use theory of meaning, consider judgments and inferences to be primary. This dispute also seems to be applicable to logic diagrams: Whereas “Euler-type diagrams” are actually only for judgments and inferences, “concept diagrams” represent ontologies by using concepts. With reference to Schopenhauer, the paper develops a position called “rational representationalism.” According to this (...)
     
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  44. Christentum im Atheismus. Bd. 1.Jens Lemanski - 2009 - London: Turnshare.
    "Christentum im Atheismus" (Christianity in Atheism) analyses the history of the development of a normative ethic of imitation, mimesis and role model that sprang from Platonism and Christianity and was transformed in the atheistic or agnostic philosophy of modernity. The first volume describes the development of this ethics from antiquity to the Enlightenment using the example of several philosophical and theological writings.
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  45. Christentum im Atheismus. Bd. 2.Jens Lemanski - 2011 - London: Turnshare.
    "Christentum im Atheismus" (Christianity in Atheism) analyses the history of the development of a normative ethic of imitation, mimesis and role model that sprang from Platonism and Christianity and was transformed in the atheistic or agnostic philosophy of modernity. The first volume describes the development of this ethics from antiquity to the Enlightenment using the example of several philosophical and theological writings. It is shown that even the descriptive representation of exemplary behaviour can have a normative function.
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  46. Christoph Schröder: Evolutionstheorie und Willensmetaphysik. [REVIEW]Jens Lemanski - 2018 - Schopenhauer Jahrbuch 96:176-181.
  47. Christentum und Mystik.Jens Lemanski - 2018 - In Matthias Koßler & Daniel Schubbe (eds.), Schopenhauer-Handbuch. Stuttgart, Deutschland: pp. 200-206.
    Schopenhauer's struggles with Christianity and mysticism are considered in this paper under three aspects: (1) methodology and defnitions, (2) doxography of dogmatics, (3) mystology and hagiology. In the first section, Schopenhauer's approaches and opinions in dealing with Christianity are described. In the second section, relevant passages from Schopenhauer's work on Christian dogmatic topics are compiled and systematized. In the third section, the function and significance of the Christian mystics and saints for Schopenhauer's life and work are presented.
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  48. Der Philosophiebegriff Im Florentinischen Renaissancepiatonismus Zwischen Pythagoreismus Und Aristotelismus.Jens Lemanski - 2016 - Archiv für Begriffsgeschichte 58:27-65.
    The paper examines the definitions of the concept ›philosophy‹ resp. ›the philosopher‹ in Florentine renaissance Platonism, namely Marsilio Ficino and his scholar Francesco di Zanobi Cattani da Diacceto. Following Socrates and Pythagoras, Ficino distinguishes between mundane philosophy and divine sapientia. In contrast to his teacher, Diacceto's Aristotelism rejects the Pythagoreanism and connects philosophy with sapientia. In order to show how the differences between Ficino and Diacceto emerge, three more contemporaries are taken into consideration: Christoforo Landino, Angelo Poliziano and Giovanni Pico (...)
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  49. Der Tod Gottes als Apoptose oder Nekrose – Zur Konstitution höherer Immunsysteme.Jens Lemanski & Eva Siepmann - 2010 - Internationale Zeitschrift Für Philosophie Und Psychosomatik 2.
    Das folgende Essay erläutert, warum der Tod Gottes sowohl in einem konsequent theistischen System als auch bei atheistischen Denkern unausweichlich ist. Zur Beantwortung der Frage, wie Gott gestorben ist, werden hauptsächlich Autoren wie Friedrich W. Schelling , Friedrich Nietzsche und Peter Sloterdijk herangezogen. Da die Rede vom Tod Gottes den Verdacht erweckt, metaphorisch zu sein, werden wir mit Apoptose und Nekrose auch zwei unterschiedliche Metaphern anwenden, um den vorliegenden Sachverhalt zu beschreiben . Das letzte Kapitel fragt dann nach den Konsequenzen (...)
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  50.  5
    Schopenhauer-Lexikon.Jens Lemanski & Daniel Schubbe (eds.) - 2021 - Paderborn, Deutschland: Fink.
    The encyclopaedia presents Arthur Schopenhauer's work and explains the basic concepts of his philosophy. It offers 200 entries by 76 authors from 18 countries. Beside an overview of works and central concepts, a history of Schopenhauer's influence is given. The Schopenhauer encyclopaedia can be read as a complete introduction or used as a reference work and compendium. ++++++++++++++++++++++++++++++++++++++++++ Das Lexikon stellt Arthur Schopenhauers Werk vor und erläutert die Grundbegriffe seiner Philosophie. Es bietet 200 Einträge von 76 Autorinnen und Autoren aus (...)
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