Dear colleagues,

We are pleased to announce that DEON 2027, the 18th International Conference on Deontic Logic and Normative Systems, will be held at Zhejiang University in Hangzhou, China, from 29 June to 1 July 2027 — the first edition of the series to be held in Asia since its founding in 1991. The conference is hosted by the School of Philosophy of Zhejiang University and the Zhejiang University–University of Luxembourg Joint Lab on Advanced Intelligent Systems and Reasoning (ZLAIRE).

The biennial DEON conference series brings together researchers interested in the formal study of normative concepts, normative reasoning, and normative systems, using methods from computer science, artificial intelligence, philosophy, linguistics, mathematics, and law. Topics include deontic logic, normative reasoning, legal reasoning, normative multi-agent systems, explainability, and trustworthy systems (full list on the website).

The general theme of this edition is "Normativity under Uncertainty". Normative systems are inescapably confronted with uncertainty: agents must frequently deliberate about what ought to be done on the basis of information that is incomplete, imprecise, or conflicting — about the facts of the case, the norms in force, the consequences of action, or the reliability of one's sources. This edition investigates how central normative concepts, among them obligation, permission, responsibility, and blame, can be rigorously formalized, interpreted, and applied once the classical idealizations of certainty, consistency, and full information are lifted.

Key dates (all Anywhere on Earth):

Abstract submission deadline: 5 March 2027
Paper submission deadline: 12 March 2027
Notification of acceptance: 6 May 2027
Conference: 29 June – 1 July 2027
The conference will invite submissions of original and unpublished work (max. 15 pages, excluding references and technical appendix); reviewing will be double-blind. The proceedings will be published by College Publications as an open-access book. The full call for papers, including templates and the EasyChair submission link, will be released in November 2026.

Programme committee co-chairs:

Huimin Dong (TU Wien, Austria)
Beishui Liao (Zhejiang University, China)
Réka Markovich (University of Luxembourg, Luxembourg)

Website: https://www.zlaire.net/deon2027/
Contact: zhengzhoulogic@zju.edu.cn

Please save the date, and feel free to forward this announcement to interested colleagues and students.

Best regards,
The DEON 2027 Programme Committee Co-Chairs