:: 2018 A Guided Tour of Logical Geometry, Based on the KeynesJohnson Octagon. Keynote talk at the 6th World Congress on the Square of Opposition, Crete (Greece), November 1  5, 2018.
 The Interplay between Aristotelian and Duality Relations in Four Octagons of Opposition (joint work with Hans Smessaert). 6th World Congress on the Square of Opposition, Crete (Greece), November 1  5, 2018.
 Aristotelian Diagrams for the Proportional Quantifier 'Most' (joint work with Hans Smessaert). 6th World Congress on the Square of Opposition, Crete (Greece), November 1  5, 2018.
 Ordering Relations, Partitions and Aristotelian Diagrams (joint work with Hans Smessaert). Logic Now and Then 4 (LNAT4), Brussels (Belgium), September 20, 2018.
 Writing and Drawing in Logic  The Case of Aristotelian Diagrams. Workshop on Practices of Writing and Reading in Logic, affiliated workshop of UNILOG 2018, Vichy (France), June 23  24, 2018.
 Towards a Typology of Diagrams in Linguistics (joint work with Hans Smessaert; talk delivered by Hans Smessaert). Diagrams 2018: the 10th International Conference on the Theory and Application of Diagrams, Edinburgh (UK), June 18  22, 2018.
 Aristotelian and Duality Relations Beyond the Square of Opposition (joint work with Hans Smessaert; talk delivered by Hans Smessaert). Diagrams 2018: the 10th International Conference on the Theory and Application of Diagrams, Edinburgh (UK), June 18  22, 2018.
 The Role of Aristotelian Diagrams in Scientific Communication. 8th Visual Learning Conference, Budapest (Hungary), April 26  28, 2018.
 Aristotelian Diagrams: the Forgotten Icons of Logic (joint work with Hans Smessaert). Workshop on Scholarly Forgetting in the Humanities, Helmstedt (Germany), April 19  21, 2018.
 Response to Catarina Dutilh Novaes, Metaphors for Argumentation: A SocialEpistemological Approach. Thursday Lectures, Leuven (Belgium), March 1, 2018.
:: 2017 The Logical Geometry of Russell's Theory of Definite Descriptions. Poster presentation at the Fourth Philosophy of Language and Mind Conference (PLM4), Bochum (Germany), September 21  23, 2017.
 The Logical Geometry of Russell's Theory of Definite Descriptions. Research Colloquium 'Logic and Epistemology' of the Institut für Philosophie II, Bochum (Germany), July 13, 2017.
 Duality and Lexicalization in Medieval Squares of Opposition (joint work with Hans Smessaert and Dany Jaspers). Third CLAW/DWMC Symposium on Analytic and Medieval Philosophy, Leuven (Belgium), May 31, 2017.
:: 2016 The Logical Geometry of Russell's Theory of Definite Descriptions. Research Seminar of the Center for Logic and Analytical Philosophy (CLAW), Leuven (Belgium), November 15, 2016.
 The Interaction between Logic and Geometry in Aristotelian Diagrams (joint work with Hans Smessaert). Diagrams 2016: the 9th International Conference on the Theory and Application of Diagrams, Philadelphia, PA (United States), August 7  10, 2016.
 Visualising the Boolean Algebra B_4 in 3D (joint work with Hans Smessaert). Poster presentation at Diagrams 2016: the 9th International Conference on the Theory and Application of Diagrams, Philadelphia, PA (United States), August 7  10, 2016.
 The Continuity between Logic and Metalogic from the Perspective of Logical Geometry. Workshop 'Language and Metalanguage, Logic and Metalogic  Revisiting Tarski's Hierarchy', LouvainlaNeuve (Belgium), May 19  20, 2016.
 Response to Mingyu Ma, Supposition and Reference. Second CLAW/DWMC Symposium on Analytic and Medieval Philosophy, Leuven (Belgium), April 22, 2016.
:: 2015 Interactively Illustrating the ContextSensitivity of Aristotelian Diagrams. Ninth International and Interdisciplinary Conference on Modeling and Using Context (CONTEXT 2015), Larnaca (Cyprus), November 2  6, 2015.
 Shape Heuristics in Aristotelian Diagrams (joint work with Hans Smessaert). SHAPES 3.0, Larnaca (Cyprus), November 2, 2015.
 Aristotelian Diagrams for MultiOperator Formulas in Avicenna and Buridan (joint work with Hans Smessaert). 15th Congress of Logic, Methodology and Philosophy of Science (CLMPS), Helsinki (Finland), August 3  8, 2015.
 Metalogical Decorations of Logical Diagrams (joint work with Hans Smessaert). 15th Congress of Logic, Methodology and Philosophy of Science (CLMPS), Helsinki (Finland), August 3  8, 2015.
 Response to Luca Gili, Thomas Aquinas on Future Contingents. First CLAW/DWMC Symposium on Analytic and Medieval Philosophy, Leuven (Belgium), May 22, 2015.
 Buridan's and Avicenna's Aristotelian Diagrams for Combined Operators. First CLAW/DWMC Symposium on Analytic and Medieval Philosophy, Leuven (Belgium), May 22, 2015.
 OneSided versus TwoSided Readings of Many and Few (joint work with Hans Smessaert; talk delivered by Hans Smessaert). Logic Now and Then 3 (LNAT3), Brussels (Belgium), February 5, 2015.
:: 2014 A Unified Account of Aristotelian and Hasse Diagrams. Fourth Young Researchers Days in Logic, Philosophy and History of Science (YRD 4), Brussels (Belgium), September 26  27, 2014.
 Logical and Geometrical Complementarities between Aristotelian Diagrams (joint work with Hans Smessaert; talk delivered by Hans Smessaert). Diagrams 2014: the 8th International Conference on the Theory and Application of Diagrams, Melbourne (Australia), July 28  August 1, 2014.
 The Relationship between Aristotelian and Hasse Diagrams (joint work with Hans Smessaert; talk delivered by Hans Smessaert). Diagrams 2014: the 8th International Conference on the Theory and Application of Diagrams, Melbourne (Australia), July 28  August 1, 2014.
 Logical Geometries and Information in the Square of Oppositions and its Extensions. 4th World Congress on the Square of Opposition, Rome/Vatican (Italy), May 5  9, 2014.
 Algebraic and Cognitive Aspects of Presenting Aristotelian Diagrams (joint work with Hans Smessaert). 4th World Congress on the Square of Opposition, Rome/Vatican (Italy), May 5  9, 2014.
 The Unreasonable Effectiveness of Bitstrings in Logical Geometry (joint work with Hans Smessaert; talk delivered by Hans Smessaert). 4th World Congress on the Square of Opposition, Rome/Vatican (Italy), May 5  9, 2014.
 A Unified Account of Aristotelian and Hasse Diagrams. Fourth Philosophy Graduate Conference, Leuven (Belgium), March 28, 2014.
 Logical Geometry: Platonic Representations of Aristotelian Logic. Common Seminar of the Institute of Philosophy (HIW), Leuven (Belgium), March 26, 2014.
 The Dynamics of Surprise. Poster presentation at the second Day on Research in the Humanities and Social Sciences, Leuven (Belgium), March 12, 2014.
:: 2013 Neighborhood Semantics for Public Announcement Logic. Congress on Logic and Philosophy of Science (CLPS 13), Ghent (Belgium), September 16  18, 2013.
 Weak and Strong Interpretations of the Dynamic Turn in Epistemic Logic. Third Philosophy Graduate Conference, Leuven (Belgium), March 22, 2013.
:: 2012 The Role of Information in Logical Geometry (joint work with Hans Smessaert). Research Seminar of the Center for Logic and Analytical Philosophy (CLAW), Leuven (Belgium), November 23, 2012.
 Surprise in Probabilistic Dynamic Epistemic Logic.
Logic and Interactive Rationality (LIRA) Workshop, ILLC, Amsterdam (the Netherlands), October 4, 2012.
 Surprise in Probabilistic Dynamic Epistemic Logic. Conference of the Reasoning Club, Brussels (Belgium), September 17  19, 2012.
 Logical Omniscience and Structured Propositions. Third Young Researchers Days in Logic, Philosophy and History of Science (YRD 3), Brussels (Belgium), September 3  4, 2012.
 Algebraic Aspects of Duality Diagrams. Poster presentation at Diagrams 2012: the 7th International Conference on the Theory and Application of Diagrams, Canterbury (UK), July 2  6, 2012.
 Surprise in Probabilistic DEL. 10th Conference on Logic and the Foundations of Game and Decision Theory (LOFT 2012), Sevilla (Spain), June 18  20, 2012.
 The Role of Information in Logical Geometry (joint work with Hans Smessaert). Informal workshop of the research groups on logical geometry and nopposition theory, Leuven (Belgium), June 11, 2012.
 Information in the Square of Oppositions (joint work with Hans Smessaert). Trends in Logic XI, Bochum (Germany), June 3  5, 2012.
 The Dynamics of Surprise. Modal Logic workshop, Brussels (Belgium), May 8, 2012.
 A Brief Overview of Logical Geometry. PhDs in Logic IV, Ghent (Belgium), April 12  13, 2012.
 Reduction Axioms in Dynamic Logics of Agency. Second Philosophy Graduate Conference, Leuven (Belgium), March 23, 2012.
:: 2011 Group Theory and Duality Diagrams. Logic Now and Then 2 (LNAT 2), Brussels (Belgium), December 21  22, 2011.
 Logical Geometry: What, How, and Why? Informal workshop of the research groups on logical geometry and nopposition theory, Leuven (Belgium), November 11  12, 2011.
 An Algebraic Perspective on Duality in Logic and Language. Poster presentation at the first Day on Research in the Humanities and Social Sciences, Leuven (Belgium), November 10, 2011.
 An Algebraic Perspective on Duality in Logic and Language. Poster presentation at Semantics and Philosophy in Europe 4 (SPE 4), Bochum (Germany), September 26  October 1, 2011.
 Structures of Oppositions in Public Announcement Logic. And: Some Algebraic Remarks on Duality. Symposium on the Logic of Opposition (affiliated symposium of CLMPS 14), Nancy (France), July 19  26, 2011.
 Neighborhood Semantics for Dynamic Epistemic Logics. 14th Congress of Logic, Methodology and Philosophy of Science (CLMPS), Nancy (France), July 19  26, 2011.
 The Dynamic Turn in Epistemic Logic: A Philosophical Perspective. First Philosophy Graduate Conference, Leuven (Belgium), April 1, 2011.
 Epistemic Dynamics and Logical Omniscience. Research Seminar in Logic and Language, TiLPS, Tilburg (the Netherlands), March 10, 2011.
 Epistemic Dynamics and Logical Omniscience. Research Seminar of the Center for Logic and Analytical Philosophy (CLAW), Leuven (Belgium), March 9, 2011.
:: 2010  The Use of Corpus Linguistics in the Philosophy of Mathematical Practice (joint work with Benedikt Löwe and Bernhard Schröder). First International Meeting of the Association for the Philosophy of Mathematical Practice (APMP), Brussels (Belgium), December 9  11, 2010.
 Narrative and Information. Logical and Philosophical Comments on Benedikt Löwe's 'Formal Models of Narrative'. Third Workshop in the Philosophy of Information, Brussels (Belgium), November 18  19, 2010.
 Agreeing to Disagree in Probabilistic Dynamic Epistemic Logic. Research Seminar in Logic and Language, TiLPS, Tilburg (the Netherlands), October 28, 2010.
 Contemporary EpistemicDoxastic Logic and the Lockean Thesis. Logic, Reasoning and Rationality (LRR 10), Ghent (Belgium), September 20  22, 2010.
 Looking for the Right Notion of Epistemic Plausibility Model. Second Young Researchers Days & Workshop on Logic, Philosophy and History of Science (YRD 2), Brussels (Belgium), September 6  7, 2010.
 Some Remarks on the Model Theory of Epistemic Plausibility Models. 9th Conference on Logic and the Foundations of Game and Decision Theory (LOFT 2010), Toulouse (France), July 5  7, 2010.
 Reversed Squares of Opposition in PAL and DEL. 2nd World Congress on the Square of Opposition, Corte (France), June 17  20.
 Formalizing Dynamic Probabilistic Agreement Theorems. Research Seminar of the Formal Epistemology Project (FEP), Leuven (Belgium), June 1, 2010.
 Agreeing to Disagree in Probabilistic DEL. Logic and Interactive Rationality (LIRA) Workshop, ILLC, Amsterdam (the Netherlands), April 12, 2010.
 Towards a Dynamics of Realistic Knowledge: Neighborhood Semantics for Public Announcement Logic. VAF IV: Fourth Conference of the DutchFlemish Association for Analytic Philosophy, Leuven (Belgium), January 20  22, 2010.
:: 2009  ''It is easy to see that...'' A corpus study of mathematical proof. Logic Tea Colloquium, ILLC, Amsterdam (the Netherlands), April 21, 2009.

