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Chair of Philosophy I – Prof. Dr. Olivier Roy

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Olivier Roy Prof. Dr. Olivier Roy
Olivier Roy

Faculty of Cultural Studies
Chair of Philosophy I

I am Professor of Philosophy and joined the Department at the start of the Winter Semester 2013-14. I am also external member of the Munich Center for Mathematical Philosophy, where I worked for two years as assistant professor. Before that I worked at the Rijksuniversiteit Groningen in the Faculty of Philosophy. I have completed my PhD in February 2008 at the Institute for Logic, Language and Computation in Amsterdam, under the supervision of Johan van Benthem (Amsterdam and Stanford) and Martin van Hees (Groningen).

I am associate editor of Topoi and Section Editor for the "Logic, Computation and Agency" Section of the Stanford Encyclopedia of Philosophy (the latter together with Eric Pacuit and Johan van Benthem). From 2011 to 2020 I have also been associate editor of  Erkenntnis. Since 2023 I am co-chair of the steering committee of the DEON (Deontic Logic in Computer Science) and the LOFT (Logic and the Foundations of Decision and Game Theory) conference series.

Areas of expertise

I study questions of rationality in strategic interaction, learning and belief revision in social network, structure and justification of norms, and the philosophy of shared agency. For this I use methods from logic, computer science, and decision and game theory.


For my current and past courses, please see the P&E intranet.


  • Co-head of Department (Philosophy)
  • Co-director of Philosophy and Economics BA program.
Olivier Roy

Faculty of Cultural Studies
Chair of Philosophy I



Ade, Leyla; Roy, Olivier
Team Reasoning from an Evolutionary Perspective : Categorization and Fitness
in Historical Social Research volume 48 (2023) issue 3. - page 75-93


Ade, Leyla; Roy, Olivier
Team Reasoning from an Evolutionary Perspective : Categorization and Fitness
https://drive.google.com/file/d/1BEUkm5JVLHLvFS3D8 ...
Logic and the Foundations of Game and Decision Theory (LOFT 2022), Groningen, Niederlande


Markovich, Réka; Roy, Olivier
Cause of Action and the Right to Know : A Formal Conceptual Analysis of the Texas Senate Bill 2 ...
Legal Knowledge and Information Systems
Amsterdam : IOS Press, 2021. - page 217-224 . - (Frontiers in Artificial Intelligence and Applications; 346)
doi:10.3233/FAIA210340 ...

Markovich, Réka; Roy, Olivier
A Logical Analysis of Freedom of Thought
Deontic Logic and Normative Systems : 15th International Conference, DEON 2020/2021
London : College Publication, 2021. - page 245-260

Rafiee Rad, Soroush; Roy, Olivier
Deliberation, Single-Peakedness, and Coherent Aggregation
in American Political Science Review volume 115 (2021) issue 2. - page 629-648
doi:10.1017/S0003055420001045 ...

Dong, Huimin; Roy, Olivier
Dynamic logic of legal competences
in Journal of Logic, Language and Information volume 30 (2021) issue 4. - page 701-724
doi:10.1007/s10849-021-09340-z ...

Christoff, Zoé; Gratzl, Norbert; Roy, Olivier
Priority Merge and Intersection Modalities
in The Review of Symbolic Logic volume 14 (2021) . - page 1-33
doi:10.1017/S1755020321000058 ...

Bílková, Marta; Christoff, Zoé; Roy, Olivier
Revisiting Epistemic Logic with Names
Proceedings of the 18th Conference on Theoretical Aspects of Rationality and Knowledge, Beijing, China, June 25-27, 2021
Beijing : Open Publishing Association, 2021. - page 39-54 . - (Electronic Proceedings in Theoretical Computer Science; 335)
doi:10.4204/EPTCS.335.4 ...

Roy, Olivier; Schwenkenbecher, Anne
Shared Intentions, Loose Groups, and Pooled knowledge
in Synthese volume 198 (2021) . - page 4523-4541
doi:10.1007/s11229-019-02355-x ...


Kulicki, Piotr; Roy, Olivier
From Permissions to Obligations and Beyond : An Editorial
in Studia Logica volume 108 (2020) issue 1. - page 1-3
doi:10.1007/s11225-019-09881-2 ...

Roy, Olivier; Kulicki, Piotr
Legal Permissibility and Legal Competences in Hierarchical Systems with Strong Permission
in Journal of Zhejiang University: Humanities and Social Sciences volume 50 (2020) issue 5. - page 51-62
http://open.oriprobe.com/articles/60398240/Legal_P ...


Roy, Olivier; Dong, Huimin; Gratzl, Norbert
Open Reading and Free Choice Permission : A Perspective in Substructural Logics
Dynamics, Uncertainty and Reasoning
Singapore : Springer, 2019 (Logic in Asia)


Romeijn, Jan-Willem; Roy, Olivier
All Agreed : Aumann meets DeGroot
in Theory and Decision volume 85 (2018) issue 1. - page 41-60
doi:10.1007/s11238-017-9633-9 ...

Grossi, Davide; Roy, Olivier
Introduction : Selected Papers from the 4th Workshop on Logic, Rationality and Interaction (LOR ...
in Journal of Logic and Computation volume 28 (2018) issue 8. - page 1713-1714
doi:10.1093/logcom/exv024 ...

Klein, Dominik; Roy, Olivier; Gratzl, Norbert
Knowledge, belief, normality, and introspection
in Synthese volume 195 (2018) . - page 4343-4372
doi:10.1007/s11229-017-1353-8 ...


Dong, Huimin; Roy, Olivier
Dynamic Logic of Power and Immunity
Logic, Rationality, and Interaction
Berlin : Springer, 2017. - page 123-136 . - (Lecture Notes in Computer Science; 10455)
doi:10.1007/978-3-662-55665-8_9 ...

Shi, Chenwei; Roy, Olivier
Reason to Believe
Logic, Rationality, and Interaction
Berlin : Springer, 2017. - page 676-680 . - (Lecture Notes in Computer Science; 10455)
doi:10.1007/978-3-662-55665-8_51 ...


Deontic Logic and Normative Systems
publ: Roy, Olivier; Tamminga, Allard; Willer, Malte
London : College Publications, 2016

Pacuit, Eric; Roy, Olivier
A Dynamic Analysis of Interactive Rationality
Epistemology, Knowledge and the Impact of Interaction
Cham : Springer, 2016. - page 187-206 . - (Logic, Epistemology, and the Unity of Science; 38)
doi:10.1007/978-3-319-26506-3_6 ...

Roy, Olivier; Hjortland, Ole Thomassen
Dynamic consequence for soft information
in Journal of Logic and Computation volume 26 (2016) issue 6. - page 1843-1864
doi:10.1093/logcom/exu040 ...

Pacuit, Eric; Roy, Olivier
Epistemic Foundations of Game Theory
Stanford Encyclopedia of Philosophy
Stanford, Calif. : The Metaphysics Research Lab, Stanford Univ., 2016
http://plato.stanford.edu/archives/spr2016/entries ...


Romeijn, Jan-Willem; Roy, Olivier
Individual and Social Deliberation : Introduction
in Economics & Philosophy volume 31 (2015) issue 1. - page 1-2
https://www.cambridge.org/core/services/aop-cambri ...

Klein, Dominik; Gratzl, Norbert; Roy, Olivier
Introspection, Normality and Agglomeration
Logic, Rationality, and Interaction
Berlin : Springer, 2015. - page 195-206 . - (Lecture Notes in Computer Science; 9394)
doi:10.1007/978-3-662-48561-3_16 ...

Anglberger, Albert J. J.; Gratzl, Norbert; Roy, Olivier
Obligation, free choice, and the logic of weakest permissions
in The Review of Symbolic Logic volume 8 (2015) issue 4. - page 807-827
doi:10.1017/S1755020315000209 ...

Dong, Huimin; Roy, Olivier
Three Deontic Logics for Rational Agency in Games
in Studies in Logic volume 8 (2015) issue 4. - page 7-31
https://www.researchgate.net/profile/Huimin_Dong/p ...


Roy, Olivier; Anglberger, Albert J. J.; Gratzl, Norbert
The Logic of Best Actions from a Deontic Perspective
Johan van Benthem on Logic and Information Dynamics
Cham : Springer, 2014. - page 657-676 . - (Outstanding Contributions to Logic; 5)
doi:10.1007/978-3-319-06025-5_24 ...

Rechenauer, Martin; Roy, Olivier
The Logical Structure of Scanlon’s Contractualism
Deontic logic and normative systems
Cham : Springer, 2014. - page 166-176 . - (Lecture Notes in Computer Science; 8554)
doi:10.1007/978-3-319-08615-6_13 ...

Anglberger, Albert J. J.; Dong, Huimin; Roy, Olivier
Open reading without free choice
Deontic logic and normative systems
Cham : Springer, 2014. - page 19-32 . - (Lecture Notes in Computer Science; 8554)
doi:10.1007/978-3-319-08615-6_3 ...

Romeijn, Jan-Willem; Roy, Olivier
Radical Uncertainty : Beyond Probabilistic Models of Belief
in Erkenntnis volume 79 (2014) issue 6. - page 1221-1223
doi:10.1007/s10670-014-9687-9 ...


van Hees, Martin; Pauly, Marc; Roy, Olivier
Democratisch optimisme : deliberatie in theorie en praktijk
Omstreden democratie : Over de problemen van een succesverhaal
Amsterdam : Boom, 2013. - page 207-223


Logic, Rationality, and Interaction
publ: Grossi, Davide; Roy, Olivier; Huang, Huaxin
Berlin : Springer, 2013 . - (Lecture Notes in Computer Science; 8196)
doi:10.1007/978-3-642-40948-6 ...

Roy, Olivier; Pacuit, Eric
Substantive Assumptions in Interaction : a Logical Perspective
in Synthese volume 190 (2013) issue 5. - page 891-908
doi:10.1007/s11229-012-0191-y ...


Dégremont, Cédric; Roy, Olivier
Agreement Theorems in Dynamic-Epistemic Logic
in Journal of Philosophical Logic volume 41 (2012) issue 4. - page 735-764
doi:10.1007/s10992-012-9236-4 ...
2nd Workshop on Logic, Rationality and Interaction (LORI-II), Chongqing, China

Egré, Paul; Roy, Olivier
Les conventions sans la connaissance commune?
in Klēsis (2012) issue 24. - page 272-310
http://www.revue-klesis.org/pdf/Klesis-Lewis-11-Eg ...

Roy, Olivier; Anglberger, Albert J. J.; Gratzl, Norbert
The logic of obligation as weakest permission
Deontic logic in computer science
Berlin : Springer, 2012. - page 139-150 . - (Lecture Notes in Computer Science; 7393)
doi:10.1007/978-3-642-31570-1_10 ...

Roy, Olivier
reviewed by: Gilboa, Itzhak: Rational Choice. Cambrigde, 2010
in Economics & Philosophy volume 28 (2012) issue 1. - page 102-107
doi:10.1017/S0266267112000077 ...


Pacuit, Eric; Roy, Olivier
A dynamic analysis of interactive rationality
Logic, Rationality and Interaction : Third International Workshop, LORI 2011, Guangzhou, China, October 10-13, 2011. Proceedings
Berlin; Heidelberg : Springer, 2011. - page 244-257 . - (Lecture Notes in Computer Science; 6953)
doi:10.1007/978-3-642-24130-7_18 ...

van Benthem, Johan; Pacuit, Eric; Roy, Olivier
Toward a theory of play : A logical perspective on games and interaction
in Games volume 2 (2011) issue 1. - page 52-86
doi:10.3390/g2010052 ...


Epistemic Logic : 5 Questions
publ: Hendricks, Vincent F.; Roy, Olivier
Kopenhagen : Automatic Press/VIP, 2010

Pacuit, Eric; Roy, Olivier
Logic, Interaction and Collective Agency
European Summer School in Logic, Language & Information, University of Copenhagen, Denmark

Liu, F.; Roy, Olivier
Advances in Belief Dynamics : introduction
in Synthese volume 173 (2010) issue 2. - page 123-126
doi:10.1007/s11229-009-9710-x ...

Roy, Olivier
Epistemic logic and the foundations of decision and game theory
in Journal of Indian Council of Philosophical Research volume 27 (2010) issue 2. - page 283-314

Roy, Olivier
Interpersonal Coordination and Epistemic Support for Intentions with We-Content
in Economics & Philosophy volume 26 (2010) issue 03. - page 345-367
doi:10.1017/S0266267110000404 ...


Roy, Olivier; Pacuit, Eric
Of what one cannot speak, must one pass over in silence?
s.l., 2010


Roy, Olivier
A dynamic-epistemic hybrid logic for intentions and information changes in strategic games
in Synthese volume 171 (2009) issue 2. - page 291-320
doi:10.1007/s11229-009-9644-3 ...

van Benthem, Johan; Girard, Patrick; Roy, Olivier
Everything else being equal : A modal logic for ceteris paribus preferences
in Journal of Philosophical Logic volume 38 (2009) issue 1. - page 83-125
doi:10.1007/s10992-008-9085-3 ...

Roy, Olivier
Intentions and interactive transformations of decision problems
in Synthese volume 169 (2009) issue 2. - page 335-349
doi:10.1007/s11229-009-9553-5 ...

van Hees, Martin; Roy, Olivier
Intentions, decisions and rationality
Economics, rational choice and normative philosophy
New York ; London : Routledge, 2009. - page 56-72


van Hees, Martin; Roy, Olivier
Intentions and Plans in Decision and Game Theory
Reasons and intentions
Aldershot : Ashgate, 2008. - page 207-226


Roy, Olivier
Thinking before acting : intentions, logic, rational choice
(dissertation, , )


Roy, Olivier
Commitment-based decision making for bounded agents
Proceedings of the Workshop on Logics for Resource-Bounded Agents : organised as part of the 18th European Summer School on Logic, Language and Information (ESSLLI), August 2006, Malaga, Spain
Malaga : FoLLi, 2006. - page 112-123

Pacuit, Eric; Roy, Olivier
Preference based belief dynamics
Proceedings of The 7th Conference on Logic and the Foundations of Game and Decision Theory (LOFT 2006)
Liverpool, UK : University of Liverpool, 2006. - page 141-150

van Benthem, Johan; van Otterloo, Sieuwert; Roy, Olivier
Preference logic, conditionals and solution concepts in games
Modality matters : twenty-five essays in honour of Krister Segerberg
Uppsala : Univ., Dept. of Philosophy, 2006. - page 61-77 . - (Uppsala Philosophical Studies; 53)


van Otterloo, Sieuwert; Roy, Olivier
Verification of voting protocols
Amsterdam, Niederlande, 2005
http://citeseerx.ist.psu.edu/viewdoc/download?doi= ...


Roy, Olivier
What does Game Theory have to do with Plans?
Amsterdam, : Institute for Logic, Language and Computation (ILLC), University, 2005
https://eprints.illc.uva.nl/158/1/PP-2005-13.text. ...


Roy, Olivier
L’ockhamisme de Prior et l’ockhamisme actualiste en logique temporelle
Groningen, 2004
http://www.philos.rug.nl/~olivier/docs/acfas2004.p ...


Roy, Olivier
Étude sur les concepts d'agent et de choix dans la logique de l'action de Nuel Belnap et ses co ...
Québec, 2004
(dissertation, , )

Olivier Roy

Faculty of Cultural Studies
Chair of Philosophy I

Prof. Dr. Olivier Roy


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Universität Bayreuth
Department of Philosophy
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Phone: +49 (0)921 / 55-4151
E-mail: Olivier.Roy@uni-bayreuth.de
Homepage: www.philosophie1.uni-bayreuth.de

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