Talks
121. “Existenz und Essenz”, invited talk at Humboldt-University Berlin, Berlin, 8th of July, 2024, [planned].
120. “Existence as a Higher-order Property”, invited talk (keynote speaker) at the workshop Issues of the (Im)Possible X, University of Bratislava, Bratislava, 25th-27th of July, 2024 [planned].
119. “Existence and Negation”, invited online talk at the Complutense University of Madrid, 13th of March, 2024.
118. “Fictional Modification. A world semantic account”, talk at the workshop Bochum meets Grazer Philosophische Studien, University of Bochum, Bochum, 7th of March, 2024.
117. “Die prädikative Tradition der Kantischen Auffassung der Existenz“, invited talk to the Philosophisches Kolloquium, University of Potsdam, Potsdam, 26th of November, 2023.
116. “Frege and Tarski on logical laws”, invited talk at the workshop The Group of Münster, Schools of Polish Logicians and the Rise of Mathematical Logic in the East, University of Münster, 30th of Oktober, 2023.
115. “Die Dimensionen des fiktionalen Diskurses”, talk at the workshop Fiktion und Wirklichkeit, University of Bochum, Bochum, Veranstaltungszentrum, 13th of October, 2023.
114. “Fictional modifiers and (non-)existence entailing predicates”, talk at the workshop Fiction and Existence, University of Bochum, Essen, Haus der Technik, 30th of September 2023.
113. “Existence as a property of individual concepts and existence entailments” (together with Jan Köpping), talk at the workshop Higher-Order Theories of Existence, University of Bochum, Dortmund, Sparkassenakademi, 26th of September, 2023.
112. “The predicative tradition of the Kantian view of existence”, talk at the workshop Higher-Order Theories of Existence, University of Bochum, Dortmund, Sparkassenakademie, 25th of September, 2023.
111. “Lotze on Existence and Existence Entailing Concepts“, contributed talk at the conference Rudolf Hermann Lotze: A Reassessment, University of Paderborn, Germany, 6th of September, 2023.
110. “Existence entailing Predicates and Existential Import“, talk at the workshop The Existential Import of Singular and General Propositions, University of Göttingen, Germany, 1st of September, 2023.
108. “Wittgenstein über Sprache und logische Forschung“, invited talk at the lecture series „Ringvorlesung zur Philosophie der Moderne I“, University of Erlangen, 27th of June 2023.
107. “A criticist conception of existence”, invited talk at the workshop Being and Becoming, Complutense University of Madrid, Spain, 18th-19th of May, 2023.
106. „Die Semantik und Logik der Negation: historisch-systematisch betrachtet“ invited talk at the workshop Urteile der Logik - Logik der Urteile, department of philosophy, Fernuniversität Hagen, 29th September 2022.
105. „Freges zwei Kritikpunkte am ontologischen Gottesbeweis und der Einfluss von Fischer und Lotze“, talk at the workshop Existenz und Quantifikation: Frege, seine Vorgänger und seine Zeitgenossen Georg-August-Universität Göttingen, 30th of August 2022.
104. “Frege und Herbart über Zahl- und Existenzaussagen“, talk at the workshop on the History of the Philosophy of Logic, Georg-August-Universität Göttingen, 18th of August 2022.
103. „Anselms Gottesbeweise“, invited talk at Ringvorlesung zu Themen der Philosophie des Mittelalters, department of philosophy, Friedrich-Alexander-Universität Erlangen-Nürnberg, 12th of July 2022.
102. “The predicative tradition of Kantian conceptions of existence”, invited talk at the Research Seminar of Prof. Dr. Christian Beyer, Georg-August-Universität Göttingen, Germany 30th of June 2022.
101. “Quantifications and non-existent objects”, workshop Non-existent Objects, Wolfsburg, Mühlheim an der Ruhr, Germany, 3rd June 2022.
100. “The legacy of Kant’s conception of existence: Herbart, Frege and Schröder”, invited talk at the conference New Perspectives on Neokantianism and the Sciences, Ruhr University Bochum, 14th to 17th of March 2022.
99. “A use-sensitive account for names and demonstratives”, invited talk at the Semantics Colloquium, Johann-Wolfgang-Goethe-Universität, Frankfurt am Main, 13th of January 2022.
98. “Existential Sentences and three types of negation” (new version), invited talk Logic and Metaphysics Workshop, CUNY New York, 13th of December 2021.
97. “Existential Sentences and three types of negation”, invited talk at the research seminar of Prof. Hedde Zeijlstra and Prof. Dr. Clemens Steiner-Mayr at the English department, Georg-August-Universität Göttingen, 30th of November 2021.
96. “Existence as a property of individual concepts”, talk at the online-workshop Existence and Free Logic, 7th of October 2021.
95. “Notions of existence”, invited talk at the online-colloquium EXTRA.7 Research Colloquium, Ruhr-Universität Bochum, 7th of July 2012.
94. “Three types of negation of negative existential sentences”, talk at the online-research-colloquium Language, Logic and Information, Ruhr-Universität Bochum, 30th of June 2021.
93. “Notions of existence in Frege”, invited talk at the online-colloquium Wissenschaftheorie- und geschichte, Ruhr-Universität Bochum, 10th of June 2021.
92. “Discriminating views of existence: two overlooked varieties”, invited talk at the Serious Metaphysics Group, University of Cambridge, UK, online via zoom, 17th of March 2021.
91. “Free logic and three different types of negative existential sentences“, talk at the online workshop Empty Names, 12th of January 2021.
90. "Single Domain Free Logic and the Problem of Compositionality" invited zoom-talk at the MCMP Munich, Colloquium in Mathematical Philosophy: Logic and Language, Germany, LMU Munich, 9th of July 2020. https://www.youtube.com/watch?v=u-0AoglxOk0&t=3525s
89. "Bertrand Russell über das Kennzeichnen" invited zoom-talk at lecture series Philosophy of the Modern Age, Germany, University of Erlangen, 7th of July 2020.
https://www.youtube.com/watch?v=LmiYRglZSMc&t=6s
88. "Single Domain Free Logic and the Problem of Compositionality" talk at the Colloquium in Logic and Epistemology, Germany, Ruhr-Universität Bochum, 2nd of July 2020.
87. “Frege on Identity Statements” invited talk at the workshop Geschichte und Philosophie von Logik und Mathematik, Germany, University of Paderborn, 17th of February 2020.
86. "Descartes noneist conception of existence" talk at the workshop The natural history of the concept of being, Germany, Ruhr-Universität Bochum, 14th of February 2020.
85. "Kant und Frege über Existenz: Unterschied und Gemeinsamkeiten", invited at the Rheinisch-Westfälischen Seminars zur Geschichte und Philosophie der Mathematik, Germany, Siegen, 31st of January 2020.
84. "Descartes Konzeption der Existenz: Neu interpretiert und neu bewertet", invited talk to the Philosophisches Kolloquium, Germany, Universität Paderborn, 23th of January 2020.
83. "Gibt es nicht-existierende Gegenstände tatsächlich?", Antrittsvorlesung, Germany, Ruhr-Universität Bochum, 13th of November 2019.
82. "Quantifikationen in der Logik vor Frege im 19. Jahrhundert", talk at the Workshop Philosophie der Logik zwischen Kant und Frege, Germany, Georg-August-Universität Göttingen, 18th of July 2019.
81. “Adaptive Quantifiers and Modal Logics", talk at the Workshop Logic in Bochum V, Ruhr-Universität Bochum, Germany, 4th-5th of July 2019.
80. “Adaptive Quantifiers and Existential Import”, invited talk at the 20th Workshop on the Roots of Pragmasemantics, Szklarska Poręba, Poland, 1st-4th of March 2019.
79. “Sein und Nicht-Sein”, presentation talk for an Open-field W2-/Heisenberg-Professorship at the Ruhr-University-Bochum, Department of Philosophy I, Ruhr-University Bochum, Germany 28. 11. 2018.
78. “Descartes’ noneist conception of existence”, talk as part of an Erasmus exchange program at the Department of Philosophy of the University of Southampton, UK, 20.11.2018 [planned].
77. “Existenz und Wirklichkeit” [“existence and actuality”], invited talk at the workshop Existenz at the University of Stuttgart, Germany, 11.-12. 7. 2018.
76. “Existenz und Wirklichkeit” [“existence and actuality”], invited talk at the University of Bochum, Department of Philosophy II, Germany, 4. 4. 2018.
75. “Indexicals and demonstratives as use-sensitive expressions”, invited talk at a Mini-workshop on Philosophy of Language, Hamburg, 2nd of December, 2017.
74. “Attitude verbs as reference-shifting operators”, talk at the 4th Philosophy of Language and Mind Conference, Bochum, 23rd of September, 2017.
73. “Demonstratives: cognitive vs. semantic content”, invited talk at the conference Propositions and Linguistic/Cognitive Action, Düsseldorf, 24th of May 2017.
72. “Weak Meinongianism and the problem of generalizations with the existence predicate”, contributed talk at the conference Formal Methods and Science in Philosophy II, Inter-University Centre, Dubrovnik, Croatia, 6th of May 2017.
71. “Demonstratives and names as use-sensitive expressions”, invited talk at the research seminar of Prof. Hana Filip at the linguistics department, Heinrich-Heine-University Düsseldorf, 11th of January, 2017.
70. “Anaphoric uses of proper names”, invited talk at the research seminar of Prof. Hedde Zeijlstra and Dr. Sarah Zobel at the English department, Georg-August-Universität Göttingen, 22th of November, 2016.
69. “Descartes’ hybride Konzeption der Existenz”, talk as part of the Wintervorträge III of the department of philosophy, Georg-August-Universität Göttingen, 9th of November, 2016.
68. “The myth of bound uses of proper names”, talk as part of an Erasmus exchange program at the Department of Philosophy of University of Barcelona, Barcelona, Spain, 29th of June, 2016.
67. “Towards an adequate first-order analysis of existence”, talk as part of an Erasmus exchange program at the Department of Philosophy of the University of Barcelona, Barcelona, Spain, 28th of June, 2016.
66. “Towards an adequate first-order analysis of existence”, invited talk at the Department of Philosophy of the University of Southampton, Southampton, UK, 17th of May, 2016.
65. “Das Paradoxon der Nicht-Existenz”, invited talk at the Ringvorlesung „Von Schildkröten und Lügnern - Paradoxien und Antinomien in der Wissenschaft“ at the University of Magdeburg, Magdebrug, 16th of April, 2016.
64. “Probleme mit dem Begriff der Existenz”, invited talk at the Department of Philosophy of the University of Saarland, Saarbrücken, Germany, 10th of February, 2016.
63. “Names and their Kind of Rigidity”, defence and discussion of my paper at the Department of Philosophy of the University of Saarland, Saarbrücken, Germany, 10th of February, 2016.
62. “On Some Puzzling Features of Existential Discourse”, invited talk at the Munich Center for Mathematical Philosophy, University of Munich, Munich, Germany, 21st of January, 2016.
61. “The Myth of Bound Uses of Proper Names”, invited talk at Linguistischer Arbeitskreis of the department of German Language and Literature I, University of Cologne, Cologne, Germany, 13th of January, 2016.
60. “Everett’s Critique of Meinongianism” (together with Wilfried Keller), talk at the book symposium about Anthony Everett’s book “The Nonexistent” at the CRC Textstructures, University of Göttingen, Göttingen, Germany, 18th of December, 2015.
59. “Fictional Operators and the Semantics of Fictional Modifiers”, talk at the book symposium about Anthony Everett’s book “The Nonexistent” at the CRC Textstructures: University of Göttingen, Göttingen, Germany, 18th of December, 2015.
58. “The Myth of Bound Uses of Proper Names”, invited talk at a graduate seminar on proper names of Prof. Dr. Thomas Ede Zimmermann at the department of linguistics of the Goethe University, Frankfurt am Main, Germany 15th of July, 2015.
57. “Die Kritik von Kant und Frege am ontologischen Gottesbeweis”, probationary lecture as part of my habilitation procedure at the Philosophical Faculty of the University of Göttingen, Göttingen, Germany, 1st of July, 2015.
56. “Names and the pluralist determination of their reference”, contributed talk at Bucharest Colloquium in Analytic Philosophy 2015, Bukarest, Romania, 19th of June, 2015.
55. “Descartes und das berühmt berüchtigte Cogito Ergo Sum“, defence of my paper in the Reflektorium of the Departement of Philosophy of Göttingen, Göttingen, Germany, 10th of June, 2015.
54. “Das Rätsel um Theseus’ Schiff und das Problem der zeitlichen Veränderung“, Habilitations-Kolloquium at the Philosophical Faculty of the University of Göttingen, Göttingen, Germany, 3rd of June, 2015.
53. “Towards Impossible Worlds. An experimental approach”, (together with Edgar Onea) talk at the CRC Textstructures, University of Göttingen, Göttingen, Germany, 2nd of December, 2014.
52. “Referential and Incomplete Definite Descriptions”, contributed talk at the XXIII. Kongress der Deutschen Gesellschaft für Philosophie 2014, University of Münster, Germany, 29th of September, 2014.
51. “A Unified Analysis of Incomplete and Referential Definite Descriptions“ (together with Wilfried Keller), contributed talk at the 7th colloquium of Semantics and Philosophy in Europe at the Zentrum für Allgemeine Sprachwissenschaft (ZAS) Berlin, Germany, 26th of June, 2014.
50. “The argument from semantic interpretations for fictional realism”, invited talk at the research seminar of Prof. Dr. Thomas Grundmann and Prof. Dr. Elke Brendel, University of Cologne/University of Bonn, 13th of May, 2014.
49. “Existence as a Property of Individuals“, invited talk at the research seminar of Prof. Dr. Heinrich Wansing of the department of philosophy II at the University of Bochum, Germany, 19th of July, 2013.
48. “Names as context-sensitive referential devices”, talk at the conference The Individuation of Proper Names & the Determination of their Reference at the department of philosophy of King’s College London, United Kingdom, 13th of May, 2013.
47. “Names as indexicals“, invited talk at the research seminar of Prof. Dr. Thomas Ede Zimmermann at the department of linguistics of the Goethe University Frankfurt am Main, Germany, 25th of April 2013.
46. “Transfictional Comparisons“, talk at the conference The semantics of fictional discourse at the University of Göttingen, Germany, 23rd of March, 2013.
45. “Names as indexicals“, talk at the Research Seminar: Language & Cognition of Prof. Shalom Lappin at the department of philosophy of King’s College London, United Kingdom, 14th of March, 2013.
44. “Fictional Names and Negative Existentials“, talk as part of the Erasmus exchange program for university lecturers at the department of philosophy of Heythrop College, University of London, United Kingdom, 13th of March, 2013.
43. “Transfictional Comparisons“, invited talk given at the Philosophical Society of Heythrop College, University of London, United Kingdom, 11th of March, 2013.
42. “Namen im Kontext“ [“Names in context”], invited talk at the department of philosophy of the University of Konstanz, Germany, 13th of December, 2012.
41. “Existence and Free Logic“, contributed talk at the Joint Session 2012 of the Aristotelian Society and the Mind-Association, Stirling, United Kingdom, 8th of July, 2012.
40. “Zwei Argumente für den fiktionalen Realismus“ [“Two arguments for fictional realism”], invited talk at the CRC Textstructures of the University of Göttingen, Germany, 13th of June, 2012.
39. “Bundles of Properties and the Quest for Particularity“, invited talk at the department of philosophy of the University of Durham, United Kingdom, 7th of June, 2012.
38. “The Semantics of Singular Truth-Ascriptions“, talk as part of the staff seminar at the department of philosophy of King’s College London, United Kingdom, 16th of May, 2012.
37. “The Semantics of Singular Truth-Ascriptions“, invited talk at the department of philosophy of the University of Nottingham, United Kingdom, 9th of May, 2012.
36. “Kant, Meinong, Frege und der Begriff der Existenz“ [“Kant, Meinong, Frege and the concept of existence”], application talk for an assistant professorship in theoretical philosophy at the University of Düsseldorf, Germany, 2nd of May, 2012.
35. “Bad News for the Predicate View on Proper Names“, talk at the Research Seminar: Language & Cognition of Prof. Shalom Lappin at the department of philosophy of King’s College London, United Kingdom, 31st of January, 2012.
34. “Sind fiktionale Eigennamen als leere Eigennamen aufzufassen?“ [“Should we conceive of fictional names as empty proper names?“], invited talk at the conference Literarische Namenkunde at the department of Slavic Studies of the University of Göttingen, Germany, 8th of October, 2011.
33. “Names and Naming“, talk at the conference Proper Names: Philosophical and Linguistic Perspectives at the Lichtenberg-Kolleg of the University of Göttingen, Germany, 3rd of September, 2011.
32. “Names, Contexts and Logical Form“, invited talk at the conference Content, Context and Conversation at the Lichtenberg-Kolleg of the University of Göttingen, Germany, 23rd of June, 2011.
31. “An Axiomatic Bundle Theory of Substance“, contributed to talk at the conference Hume’s Metaphysics and Humean Metaphysics at the department of philosophy of the University of Tampere, Finland, 20th of June, 2011.
30. “Names, Contexts and Logical Form“, talk as part of the staff seminar at the department of philosophy of King’s College London, United Kingdom, 1st of June, 2011.
29. “Non-Standard Neutral Free Logic, Empty Names and Negative Existentials“, invited talk at the department of philosophy of the University of Oxford, New College, United Kingdom, 26th of May, 2011.
28. “Non-Standard Neutral Free Logic, Empty Names and Negative Existentials“, invited talk at the department of philosophy of the University of Durham, United Kingdom, 23rd of February, 2011.
27. “Non-Standard Neutral Free Logic, Empty Names and Negative Existentials“, talk as part of the staff seminar at the department of philosophy of King’s College London, United Kingdom, 10th of November, 2010.
26. “The Equivalence Schema and its Generalisation“, talk at the conference Nothing But the Truth at the department of philosophy of the Humboldt University of Berlin, Germany, 12th of August, 2010.
25. “Singular Truth Ascriptions: Truth-Predicate vs. Truth-Operator“,“, talk as part of the Erasmus exchange program for university lecturers at the department of philosophy of the University of Barcelona, Spain, 3rd of May, 2010.
24. “Neutral Free Logic, Empty Names and Negative Existentials“, talk as part of the Erasmus exchange program for university lecturers at the department of philosophy of the University of Barcelona, Spain, 26th of April, 2010.
23. “Substances as Bundles of Properties?“, talk at the workshop Wozu Substanzen? [“Why Substances?”] at the department of philosophy of the University of Göttingen, 26th of September, 2009.
22. “Non-Existence, Implicature and Semantic Transfer“, contributed talk at the conference SOPHA 2009 in Geneva, Switzerland, 5th of September, 2009.
21. “Truth and Sentential Quantification“, invited talk at the research seminar of Prof. Dr. Gerhard Schurz at the department of philosophy of the University of Düsseldorf, Germany, 26th of May, 2009.
20. “Truth and Sentential Quantification“, talk as part of the Erasmus exchange program for university lecturers at the department of philosophy of the University St. Andrews, United Kingdom, 14th of May, 2009.
19. “Non-Existence, Implicature and Semantic Transfer“, talk as part of the Erasmus exchange program for university lecturers at the department of philosophy of the University St. Andrews, United Kingdom, 13th of May, 2009.
18. “Assertions, Assertives and Illocutionary Purpose“, invited talk as part of the workshop Speech Acts and Truth Conditional Semantics at the department of English Literature and Language at the University of Göttingen, Germany, 25th of February, 2009.
17. “Brendels Argumente gegen den Kontextualismus des Wissens“ [“Brendel’s arguments against contextualism about knowledge”], contributed talk at the XXI. Deutscher Kongress für Philosophie, Essen, Germany, 18th of September, 2008.
16. “Truth and Sentential Quantification“, invited talk as part of the research seminar of Prof. Heinrich Wansing at the University of Technology Dresden, 2nd of July, 2008.
15. “The context-sensitive reference of proper names”, contributed talk at the conference Context-Dependence, Perspective & Relativity in Language and Thought in Paris, France, 10th of November, 2007.
14. “Reference and Proper Names”, contributed talk at the SEFA5 - Fifth meeting of the Spanish Society for Analytic Philosophy in Barcelona, Spain, 8th of September, 2007.
13. “Die minimalistischen Sinne von Eigennamen“ [“The minimal senses of proper names”], talk as part of the Mittelbaukolloquium at the Department of Philosophy at the University of Göttingen, Germany, 29th of November, 2006.
12. “Wahrheit und Behauptungen” [“Truth and Assertions”], talk as part of the Philosophisches Kolloquium [Philosophical Colloquium] of the department of philosophy of the University of Technology Dresden, Germany, 7th of December, 2005.
11. “Some Questions concerning the Modest Conception of Truth”, contributed talk at the ECAP 5 - Fifth European Congress for Analytic Philosophy in Lisboa, Portugal, 28th of August, 2005.
10. “Institutionelle Eigenschaften und ihre Ontologie“ [“Institutional properties and their ontology“], at the workshop Ontologie und Institutionen [Ontology and Institutions] at the University of Technology Dresden, Germany, 19th of June, 2004.
09. “Die Grenzen des Disquotationalismus“ [“The limits of disquotationalism”], invited talk as part of a graduate seminar on truth of Prof. Matthias Schirn, University of Munich, 12th of June, 2003.
08. “Bedeutung, Normativität und Faktizität“ [“Meaning, Normativity and Facticity“], talk at the workshop Normativität und Faktizität [Normativity and Facticity] at the University of Technology Dresden, Germany, 30th of April, 2003.
07. “Warum Popper Tarski mißverstehen mußte“ [“Why Popper had to misunderstand Tarski”], contributed talk at the Karl Popper 2002 - Centenary Congress at the University of Vienna, Austria, 4th of July, 2002.
06. “Frege und der Wahrheitsdeflationismus“ [“Frege and deflationism about truth“], talk at the Philosophisches Kolloquium [Philosophical Colloquium] of the Department of Philosophy of the University of Technology Dresden, Germany, 28th of May, 2002.
05. “Wittgensteins sogenannte Privatsprachenargumentation“ [“Wittgenstein’s so-called private language argument”], contributed talk at the conference 24th International Wittgenstein Symposium, Wittgenstein and the Future of Philosophy: A Reassessment after 50 Years, Kirchberg, Austria, 13th of August 2001.
04. “Was ist Wahrheitsdeflationismus?” [“What is deflationism about truth?“], talk at the 3. Tagung für Doktorandinnen und Doktoranden "Dissertation Philosophie" of the German Philosophical Society in cooperation with the department of philosophy of the University of Jena, Germany, 7th of July, 2001.
03. “Empty Names and Russell’s Name Claim”, contributed talk at the conference One Hundred Years of Russell's Paradox, International Conference in Logic and Philosophy, University of Munich, Germany, 4th of June, 2001.
02. “Wittgenstein on a problem of sameness”, Poster-Presentation at the ESPP Congress 2000 in Salzburg, Austria, September, 2000.
01. “Probleme mit Eigennamen” [“Problems with proper names“], contributed talk at the conference VI. Kongress der Österreichischen Gesellschaft für Philosophie in Linz, Austria, June, 2000.