Theory and Logic

The 17th International Conference on Deontic Logic and Normative Systems (DEON 2025) was held from June 30 to July 3, 2025 at TU Wien in Vienna. The conference opened with a full‐day of tutorials on June 30, followed by three days of invited talks, paper sessions, and poster presentations.

The organizing committee thanks all speakers and participants for their contributions and for creating a collaborative and inspiring atmosphere throughout the conference.