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The Workshop on Argumentation and Online Debates is part of the activities and the final meeting of the AGGREEY project, which focuses on truth-tracking and evaluation in online argumentation. The aim is to explore the foundations and frontiers of computational models of argument, with a particular emphasis on how they apply to real-world debate platforms and collective decision-making. This event is a multidisciplinary forum, bringing together researchers in computer science, artificial intelligence, psychology, law, ethics, and communication studies to discuss the challenges and opportunities posed by online argumentative discourse. In addition to talks by invited speakers, the workshop will include contributed presentations by project members and other researchers from France and abroad, as well as panel discussions. |
| This project was funded by the French National Research Agency (ANR grant ANR-22-CE23-0005). The organisation of the workshop is supported by the French Association for Artificial Intelligence (AFIA) and the CNRS/LabEx CIMI. | ![]() |
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Date and Location
| When: | April 8-10, 2026 |
| Where: | Université Toulouse Capitole, |
| Manufacture des Tabacs, | |
| 21 allée de Brienne, Toulouse | |
| Room MS001 |
This workshop is collocated with the 2nd Workshop on Artificial Intelligence, Data, Algorithms and Law (April 7, 2025).
Registration
Registration is free but mandatory, for organisation purposes. Please register here before March 27th, 2026.
Keynote Talks
We are pleased to announce our first keynote speakers:
- Leila Amgoud (IRIT, CNRS)
Title: Argument Similarity: Definitions, Measures, and Impact on Semantics
Abstract: Arguments constitute the backbone of any argumentation system, as they provide the evidence and reasoning needed to support claims. In many real-world contexts--such as dialogues, debates, or multi-agent interactions--arguments are rarely fully independent. They may overlap in content, rely on similar pieces of evidence, or be put forward by different individuals who express closely related ideas in distinct ways. Such phenomena naturally give rise to various forms of similarity between arguments. In this talk, I will explore several fundamental questions related to argument similarity. First, what does it mean for two arguments to be similar? Second, how can similarity be formally defined and effectively measured? Third, how should similarity be interpreted when assessing the strength or acceptability of arguments? Finally, how should argumentation semantics account for similarity? To address these questions, I will present an overview of the existing literature on similarity in argumentation. I will also highlight key conceptual and technical differences between extension-based semantics and gradual semantics, emphasizing how each framework incorporates or overlooks similarity considerations. - Anthony Hunter (University College London)
Title: Enthymemes in Computational Argumentation: What, Why, and How?
Abstract: Normally, arguments exchanged by human agents are enthymemes, which means that some premises and/or claims are implicit. So when an enthymeme is presented, the presenter expects that the intended recipient can identify the missing premises. This is because the presenter assumes that the presenter and recipient have shared knowledge (knowledge in common, and commonsense knowledge). Human agents constantly need to understand enthymemes, whether in everyday or professional life, and so we need to replicate this process in computational models of argument. To better understand, and automatically analyse, the enthymemes, it would be desirable to decode them as logical arguments. This could offer tools for better understanding arguments identified by argument mining from text, or arguments exchanged during discussions or debates. In this talk, I will review the state of the art on computational approaches to handling enthymemes. - Chris Reed (Arg Technica Ltd)
Title: Argument technology with impact
Abstract: Research into argumentation has deep roots in philosophy, mathematics, linguistics and, of course, computer science and AI. As the landscape of AI undergoes tumultuous revolution, it is even more challenging to understand how both pure and applied research can be translated into impactful results and, perhaps even, commercial opportunity. That landscape, though upending theoretical results as fast as it threatens academia itself, is nevertheless one with enormous opportunities for our area of research. Through a series of case studies covering recent academic results in LRMs, high-profile corporate investments in debate technology and smaller-scale commercial R&D developments in argument technology, we can explore the types of opportunities that exist and how they can create avenues to collaboration, to sparking deep new questions, to funding new work, to knowledge transfer, and ultimately to having meaningful impact.
Submissions
If you want to present your work during the workshop, please send us an abstract describing the contribution that you will discuss.
- Format: 1 page (including references) pdf, using this template.
- Deadline: Jan. 15th, 2026
- Submission by email: aggreey@irit.fr
Program
Wednesday - Theoretical Studies
- 09:25-09:30: Opening
- 09:30-10:30: Invited Talk by Leila Amgoud
- 10:30-11:00: Coffee Break
- 11:00-11:30: Kenneth Skiba
On the Relationship between Argument Rankings and Extension Rankings in Abstract Argumentation - 11:30-12:00: Xiang Yin, Nico Potyka, Antonio Rago, Timotheus Kampik, Francesca Toni
Contestability Problem in Edge-Weighted Quantitative Bipolar Argumentation - 12:00-14:00: Lunch break
- 14:00-14:30: Waleed Mebane
Argumentation Markets for Estimating Justification Statuses of Argument Conclusions - 14:30-15:00: Luca Redondi
When we have to agree to disagree: A formal approach to modeling case-based reasoning under moral disagreement - 15:00-15:30: Sylvie Doutre, Marie-Christine Lagasquie-Schiex, Jean-Guy Mailly, Antonio Yuste-Ginel
Incomplete enriched argumentation frameworks and their explainability - 15:30-16:00: Coffee Break
- 16:00-16:30: Alessio Zaninotto
On bridging the gap between computational argumentation semantics and human intuition
Thursday - Empirical and Computational Approaches
- 09:30-10:30: Invited Talk by Chris Reed
- 10:30-11:00: Coffee Break
- 11:00-11:30: Michael A. Muller
Argumentation and Voting Advice Application - 11:30-12:00: Jordan Thieyre
Tba - 12:00-14:00: Lunch Break
- 14:00-14:30: Liuwen Yu, Davide Liga, Reka Markovich
You Can You BB: From Chinese Debate Show to Agentic AI Alignment - 14:30-15:00: Victor David
simFOL: A Context-Sensitive Multi-Level Similarity Framework for First-Order Logic Arguments – An Axiomatic Study - 15:00-15:30: Victor David, Nino Pireaud
Learning simFOL: An Empirical Study of Text-to-FOL Translation and Similarity Learning - 15:30-16:00: Coffee Break
- 16:00-16:30: Caren Al Anaissy
Explaining Online Debate Evolution under Bipolar Gradual Argumentation Semantics
Friday
- 09:30-10:30: Invited Talk by Anthony Hunter
- 10:30-11:00: Coffee Break
- 11:00-11:30: Cecilia Graiff, Benoît Sagot, Chloé Clavel
Multilingual and cross-cultural automatic analysis and modeling of argumentation structures - 11:30-12h00: Maxime Brouat
Tba - 12:00-14:00: Lunch Break
- 14:00-15:00: Panel Discussion
Future Directions in Computational Argumentation - 15:00: Workshop Closing
Organisation
Program Chairs
- Victor David (INRIA, I3S, Université Côte d'Azur, victor.david@inria.fr)
- Jérôme Delobelle (Université Paris Cité, jerome.delobelle@u-paris.fr)
- Jean-Guy Mailly (Université Toulouse Capitole, jean-guy.mailly@irit.fr)
- Srdjan Vesic (CNRS, CRIL, Université d'Artois,vesic@cril.fr)
- Jean-Guy Mailly (Université Toulouse Capitole, jean-guy.mailly@irit.fr)
- Theo Alkibiades Collias
- Caren Al Anaissy
- Salem Benferhat
- Aurélie Beynier
- Elise Bonzon
- Maxime Brouat
- Elena Cabrio
- Victor David
- Jérôme Delobelle
- Quentin Elsaesser
- Sébastien Konieczny
- Marie-Jeanne Lesot
- Jean-Guy Mailly
- Nicolas Maudet
- Juliete Rossie
- Jordan Thieyre
- Ivan Varzinczak
- Srdjan Vesic
- Serena Villata
Practical Information
Contact
For any question about the workshop, you can contact us: aggreey@irit.fr.
Reaching Toulouse
Toulouse is easily reachable by flight (Aéroport Toulouse Blagnac), with direct flights from e.g. Algiers, Amsterdam, Brussels, Frankfort, Lisbon, London, Madrid, Marrakech, Milan, Munich, Roma, Tunis, and more, or from anywhere via connections in Paris Orly or CDG.
It can also be reached by train, arriving at Gare Toulouse Matabiau e.g. in 4h30 from Paris (Gare Montparnasse, with a connection in Bordeaux), in 4h from Marseille, or in 4h from Barcelona (with a connection in Narbonne).
Reaching the workshop
The Manufacture des Tabacs can be easily reached from the city center (for instance, 15 minutes walk from Place du Capitole, the main square in Toulouse), which means it is at walking distance from many hotels and restaurants.
If you choose an hotel further from the city center, you can take the bus or the metro to reach it. The station Compans-Caffarelli is within 15 minutes walking from the Manufacture. This is also the place where you may leave the bus from the airport.
Accommodation
Here is a list of possible options for accommodation.
- Hôtel de Brienne 4*, 20 boulevard Maréchal Leclerc (starting from 120€/night, 5 minutes walking from the Manufacture des Tabacs)
- Hôtel Albert 1er, 8 rue Rivals (starting from 85€/night, 25 minutes walking from the Manufacture des Tabacs, near Place du Capitole and city center)
- Novotel Toulouse Centre Compans Caffarelli 4*, 5 place Alfons Jourdain (starting from 130€/night, 13 minutes walking from the Manufacture des Tabacs)
- Odalys Appart'hôtel, 39 rue du Béarnais (starting from 90€/night, 9 minutes walking from the Manufacture des Tabacs)
- Résidhome Toulouse Ponts Jumeaux, Appart hôtel 3*, 105 boulevard de l’Embouchure (starting from 80€/night, 17 minutes walking from the Manufacture des Tabacs)
- Hôtel Capitole 2*, 10 rue Rivals (starting from 59€/night, 25 minutes walking from the Manufacture des Tabacs, near Place du Capitole and city center)
- B&B hôtel Toulouse Centre Canal du Midi, 77 boulevard de l’Embouchure (starting from 60€ la nuit, 17 minutes walking from the Manufacture des Tabacs)
Restaurants
Here is a list of possible options for lunch (or diner).
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Restaurants near the Manufacture des Tabacs
- Rosa Negra, Restaurant open on Thursday and Friday at lunch, bar/tapas on the evening
- Le Chevillard, 4 boulevard Maréchal Leclerc
- Les Passionnés, 31 bis Allée de Brienne
- Au Bistrot d’Hercule, 28 avenue Paul Séjourné
- Flashback Café, 6 allée de Brienne, closed on Monday and Tuesday at lunch, bar/tapas on the evening
- La crêperie de l’Ecluse, 7 allée de Brienne
- Pizzeria Marcello, 2 rue Pargaminières
- Fast-food options near the Manufacture des Tabacs
- Matcha, 31 bis allée de Brienne
- Poketeria, 17 place Saint- Pierre
- Boulangerie Le Montagu, 43 allée de Brienne
- Cafétéria du CROUS (inside the Manufacture des Tabacs)






