** 2nd Call for Participation ** SemDial 2021 – PotsDial THE 25th WORKSHOP ON THE SEMANTICS AND PRAGMATICS OF DIALOGUE 20-22 September, University of Potsdam (& the Internet) PotsDial will be the 25th edition of the SemDial workshop series, which aims to bring together researchers working on the semantics and pragmatics of dialogue in fields such as formal semantics and pragmatics, computational linguistics, artificial intelligence, philosophy, psychology, and neuroscience. In 2021 the workshop will be hosted by the Department of Linguistics at the University of Potsdam, Germany, in a hybrid format: All talk and poster sessions will be accessible online (via videoconferencing) as well as in person in Potsdam. Registration is now open via the workshop website. Participation is free this year, but you still need to register (before Sep 18th). *WEBSITE:* https://semdial2021.ling.uni-potsdam.de/ *INVITED SPEAKERS:* - Ryuichiro Higashinaka (Nagoya University): Leveraging the wisdom of the crowd to realize a character-like chatbot - Ruth Kempson (Emeritus Professor of Linguistics at King’s College London): How to Escape the Encodingism Stranglehold: Dynamic Syntax, Process and Interaction - Stefan Kopp (Bielefeld University): Human-aware conversational agents *PROGRAM* We have an exciting program with 3 keynotes, 15 talks and 14 posters, covering the semantics and pragmatics of dialogue from various perspectives, from the empirical to the theoretical to the computational. For details, please see the website. *TECHNICAL PROGRAMME CHAIRS:* Ellen Breitholtz (University of Gothenburg) Kallirroi Georgila (University of Southern California) *LOCAL ORGANISATION:* Jana Götze (University of Potsdam) David Schlangen (University of Potsdam) *SEMDIAL BOARD CHAIRS:* Ellen Breitholtz (University of Gothenburg) Julian Hough (Queen Mary University of London) https://semdial2021.ling.uni-potsdam.de/