Synopsis/Call

Decision-making and opinion-forming are everyday tasks that involve weighing pro and con arguments for or against different options. Our goal is to foster the development of technologies that support people in decision-making and opinion-forming and to improve our understanding of these processes. We invite you to participate in the 7th Touché lab on argumentation at CLEF 2026 featuring four tasks.

Register for participation Join the Touché mailing list

Shared Tasks

Important Dates

Run submission extended to May 21st, 2026.

See the CLEF 2026 homepage for other dates.

Subscribe to the Touché mailing list to receive notifications.

Paper Submission

Follow the instructions on the CLEF 2026 homepage to prepare and submit your paper.

  • Note that you can submit a paper without registering or attending the conference - there is no publication fee.
  • Take a look at papers from previous years for reference, but note that you do not need to (and maybe even can not) include results for the first submission of the paper - results are usually added only for the camera-ready version.
  • As the paper title, use the format <Your Team Name> at Touché: <Brief Description of your Approach>.
  • As the paper subtitle, use Touché at CLEF 2026 (as per the official template).
  • For citing Touché and the task you participated in, use \cite{kiesel:2026c,kiesel:2026d}; for citing TIRA, use \cite{froebe:2023}:
    @InProceedings{froebe:2023,
      address =                  {Berlin Heidelberg New York},
      author =                   {Maik Fr{\"o}be and Matti Wiegmann and Nikolay Kolyada and Bastian Grahm and Theresa Elstner and Frank Loebe and Matthias Hagen and Benno Stein and Martin Potthast},
      booktitle =                {Advances in Information Retrieval. 45th European Conference on {IR} Research ({ECIR} 2023)},
      doi =                      {10.1007/978-3-031-28241-6_20},
      editor =                   {Jaap Kamps and Lorraine Goeuriot and Fabio Crestani and Maria Maistro and Hideo Joho and Brian Davis and Cathal Gurrin and Udo Kruschwitz and Annalina Caputo},
      month =                    apr,
      pages =                    {236--241},
      publisher =                {Springer},
      series =                   {Lecture Notes in Computer Science},
      site =                     {Dublin, Ireland},
      title =                    {Continuous Integration for Reproducible Shared Tasks with TIRA.io},
      year =                     2023
    }
    @InProceedings{kiesel:2026c,
      address =                  {Berlin Heidelberg New York},
      author =                   {Johannes Kiesel and Marc Feger and Tim Hagen and Sebastian Heineking and Maximilian Heinrich and Maik Fr{\"o}be and Katarina Boland and Christine Mathews and Wilhelm Pertsch and Julia Romberg and Ines Zelch and Stefan Dietze and Matthias Hagen and Martin Potthast and Benno Stein},
      booktitle =                {Experimental IR Meets Multilinguality, Multimodality, and Interaction. 17th International Conference of the CLEF Association (CLEF 2026)},
      editor =                   {Matthias Hagen and Martin Potthast and Benno Stein and Philipp Schaer and Eva Zangerle and Sean MacAvaney and Julia Maria Stru{\ss} and Eva S{\'a}nchez Salido and Alberto Barr{\'o}n-Cede{\~n}o and Alba Garc{\'{\i}}a Seco Herrera},
      month =                    sep,
      publisher =                {Springer},
      series =                   {Lecture Notes in Computer Science},
      site =                     {Jena, Germany},
      title =                    {Overview of Touch{\'e} 2026 --- Argumentation Systems},
      year =                     2026
    }
    @InProceedings{kiesel:2026d,
      author =                   {Johannes Kiesel and Marc Feger and Tim Hagen and Sebastian Heineking and Maximilian Heinrich and Maik Fr{\"o}be and Katarina Boland and Christine Mathews and Wilhelm Pertsch and Julia Romberg and Ines Zelch and Stefan Dietze and Matthias Hagen and Martin Potthast and Benno Stein},
      booktitle =                {CLEF 2026 Working Notes},
      editor =                   {Eva S{\'a}nchez Salido and Alberto Barr{\'o}n-Cede{\~n}o and Alba Garc{\'{\i}}a Seco Herrera and Sean MacAvaney and Julia Maria Stru{\ss}},
      month =                    sep,
      publisher =                {CEUR-WS.org},
      series =                   {CEUR Workshop Proceedings},
      site =                     {Jena, Germany},
      title =                    {Overview of Touch{\'e} 2026 --- Argumentation Systems --- Extended Version},
      year =                     2026
    }
    

Awards

The best submission for each task will receive an award. In addition, our partners at the Methods Hub have agreed to provide priority support to the award-winning teams in developing their submissions into fully reusable software packages to maximize your impact.

Keynote

Irina Lock
Argumentation Strategies in Big Business Lobbying and the Struggle to Detect Them
Friedrich Schiller University Jena

When lobbying for or against regulation, interest groups use different argumentation strategies to persuade policymakers. Lobbyists may claim that a law is (not) in the public interest, emphasise the costs of a proposed policy, or highlight its expected benefits. Yet, despite their apparent predictability, such arguments are empirically difficult to identify and analyse.

One reason is that much lobbying takes place behind closed doors, limiting researchers’ access to relevant data. Moreover, inequalities between resource-rich actors such as large corporations and less well-resourced civil-society organisations are reflected in both the volume and sophistication of their arguments, resulting in quite heterogeneous data. On top, lobbying argumentation is inherently strategic: lobbyists may have good reasons to communicate their positions indirectly rather than explicitly, which adds to the challenges of analysing lobbying arguments reliably.

This keynote reports from the struggles of detecting and analysing argumentation strategies in Big Business lobbying from a communication science perspective. Drawing on examples from Big Tech lobbying and the chemicals industry, it discusses how researchers can identify and examine strategic argumentation in the political context.

Irina Lock is Professor of Strategic Communication at the Institute of Communication Science of the Friedrich Schiller University Jena.

Program

Touché is part of the CLEF 2026 conference program. All session times below are given in Jena local time (CEST). Touché is also featured in the CLEF Lab Overviews session September 21, 11:30-12:30, in Lecture Room 3 and the Best of Labs session September 22, 12:05-12:30.

Monday, September 21, in Lecture Room 3 (except posters)
10:30-11:00 Poster Session 1
14:00-15:30Touché Session 1
14:00-14:15 Welcome and Overview
Johannes Kiesel
14:15-15:30
Keynote
Argumentation Strategies in Big Business Lobbying and the Struggle to Detect Them
Irina Lock
15:30-16:00 Coffee Break and Poster Session 2
16:00-17:30 Touché Session 2
16:00-16:15 Overview of the Causality Extraction Task [paper]
Tim Hagen
16:15-16:30 Shrome at Touché: Soft-Vote Ensembling and Counter-Causal Augmentation for Causality Extraction [paper] [poster] [slides] [video]
Roham Zendehdel Nobari and Shayan Sooratgar
16:30-16:45 Overview of the Advertisement in Retrieval-Augmented Generation Task [paper]
Sebastian Heineking
16:45-17:00 ZHAW at Touché: Advertisement Detection in RAG Responses Using Query-Aware Transformers and Neutral Reference Embeddings [paper]
Samuel Stalder
17:00-17:15 Code-Doctors at Touché: Cross-Domain Argument Detection and Advertisement Removal in RAG Responses [paper]
Ahsan Siddiqui and Mansoor Alam and Zohaib Aslam and Faisal Alvi and Abdul Samad
17:15-17:30 Discussion
Tuesday, September 22, in Lecture Room 3
14:00-15:30 Touché Session 3
14:00-14:15 Overview of the Fallacy Detection Task [paper]
Maximilian Heinrich
14:15-14:30 NapierNLP at Touché: Fallacy Detection with SLMs and Model Fusion [paper] [poster] [slides]
Katarina Alexander and Md Zia Ullah and Dimitra Gkatzia
14:30-14:45 uzh_tt at Touché: Confidence-Adaptive Cascaded Fallacy Detection [paper]
Fatma-Zohra Rezkellah and Sophia Conrad
14:45-15:00 Webis at Touché: The Court of Fallacies: Adversarial LLM Advocacy with Forensic Appeal for Reddit Fallacy Detection [paper]
Christine Mathews and Maximilian Heinrich and Benno Stein
15:00-15:15 UZHCL_for_the_win at Touché: Encoder Fine-Tuning, Synthetic Augmentation, and an LLM Detour [paper]
Stylianos Psychias
15:15-15:30 helium at Touché:: The Case for Naturalistic Evaluation of Fallacy Detection [paper]
Diana Markova
15:30-16:00 Coffee Break
16:00-17:30 Touché Session 4
16:00-16:15 Overview of the Generalizability of Argument Identification in Context Task [paper]
Marc Feger
16:15-16:30 arginvariant at Touché: Error-Driven Prompt Refinement for Argument Identification [paper]
Midhun Kanadan and Maximilian Heinrich and Benno Stein
16:30-16:45 Context-Awakens at Touché: Generalizable Argument Identification with In-Context Learning [paper]
Johannes Widera
16:45-17:00 The Wildcards at Touché: Guideline-Conditioned Argument Identification with Dataset-Level Expert Routing [paper] [slides]
Muhammad Qasim Hussain and Maximilian Heinrich and Midhun Kanadan and Benno Stein
17:00-17:15 Code-Doctors at Touché: Cross-Domain Argument Detection and Advertisement Removal in RAG Responses [paper]
Ahsan Siddiqui and Mansoor Alam and Zohaib Aslam and Faisal Alvi and Abdul Samad
17:15-17:30 Discussion and Closing

Organizing Committee