Overview of Touché 2025: Argumentation Systems

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Johannes Kiesel, Çagri Çöltekin, Marcel Gohsen, Sebastian Heineking, Maximilian Heinrich, Maik Fröbe, Tim Hagen, Mohammad Aliannejadi, Sharat Anand, Tomaz Erjavec, Matthias Hagen, Matyás Kopp, Nikola Ljubesic, Katja Meden, Nailia Mirzakhmedova, Vaidas Morkevicius, Harrisen Scells, Moritz Wolter, Ines Zelch, Martin Potthast et al. (1 additional authors not shown)

Published: 2025, Last Modified: 03 Jan 2026CLEF 2025EveryoneRevisionsBibTeXCC BY-SA 4.0
Abstract: This paper is the condensed overview of Touché: the sixth edition of the lab on argumentation systems that was held at CLEF 2025. With the goal to foster the development of support-technologies for decision-making and opinion-forming, we organized four shared tasks: (1) Retrieval-Augmented Debating (RAD), in which participants submit generative retrieval systems that argue against their users and evaluate such systems (new task); (2) Ideology and Power Identification in Parliamentary Debates, in which participants identify from a speech the political leaning of the speaker’s party and whether it was governing at the time of the speech (2nd edition); (3) Image Retrieval/Generation for Arguments, in which participants find images to convey a written argument (4th edition, joint task with ImageCLEF); and (4) Advertisement in Retrieval-Augmented Generation, in which participants generate responses to queries with ads inserted and detect such inserted ads (new task). In this paper, we describe these tasks, their setup, and participating approaches in detail.