AI has witnessed a prodigious growth in uses of argumentation throughout many of its subdisciplines:

• agent system negotiation protocols that demonstrate higher levels of sophistication and robustness;
• argumentation-based models of evidential relations and legal processes that are more expressive;
• groupwork tools that use argument to structure interaction and debate;
• computer-based learning tools that exploit monological and dialogical argument structures in designing pedagogic environments;
• decision support systems that build upon argumentation theoretic models of deliberation to better integrate with human reasoning;
• and models of knowledge engineering structured around core concepts of argument to simplify knowledge elicitation and representation problems.

Furthermore, benefits have not been unilateral for AI, as demonstrated by the increasing presence of AI scholars in classical argumentation theory events and journals, and AI implementations of argument finding application in both research and pedagogic practice within philosophy and argumentation theory.

• Regular Paper submission (long & short papers): 6th July 2026

• Notification to authors: 10th August 2026
• Demo, position statement, & late breaking results submission (2 page abstract): 14th August 2026
• Demo, position statement, & late breaking results Notification to authors: 21st August 2026
• Final (Camera Ready) version of all contributions: 31st August 2026
• Workshop (exact date to be confirmed): 14-15th September 2026

Organising Committee

Giulia D’Agostino

giulia.dagostino@usi.ch
(Università della Svizzera italiana)

Floriana Grasso

floriana@liverpool.ac.uk
University of Liverpool

Nancy Green

nlgreen@uncg.edu
University of North Carolina Greensboro

Roos Scheffers

r.j.scheffers@uu.nl
Utrecht University

Jodi Schneider

jschneider@pobox.com
University of Wisconsin–Madison

Simon Wells

s.wells@napier.ac.uk
School of Computing, Edinburgh Napier University

Programme Committee

Oana Cocarascu

King's College London

Yuanxi Fu

School of Information Sciences, University of Illinois Urbana-Champaign

Boris Galitsky

Moscow Institute of Physics and Technology

Floriana Grasso

University of Liverpool

Randy Harris

University of Waterloo

Zheng Heng

University of Kentucky

Stella Heras

Universitat Politecnica de Valencia

Helmut Horacek

Saarland University

Loris Isabettini

University of Windsor

Antonis Kakas

University of Cyprus

Mare Koit

University of Tartu

Elena Musi

University of Liverpool

Rudi Palmieri

University of Liverpool

Andrea Pazienza

Innovation Lab, Exprivia S.p.A.

Paul Piwek

The Open University

Antonio Rago

Imperial College London

Ramon Ruiz-Dolz

Centre for Argument Technology, University of Dundee

Patrick Saint-Dizier

IRIT-CNRS

Guillermo R. Simari

Universidad del Sur in Bahia Blanca

Mark Snaith

Robert Gordon University Aberdeen

Tommy Yuan

University of York

• Our 2026 host organisation, the 11th International Conference on Computational Models of Argument, and
• CEUR Workshop proceedings who graciously host our published papers.
• The TIB who provide long-term archival hosting for CMNA proceedings.
• The Microsoft CMT service was used for managing the peer-reviewing process for this conference. This service was provided for free by Microsoft and they bore all expenses, including costs for Azure cloud services as well as for software development and support.

We pride ourselves on operating CMNA as a “broad church” and aiming for inclusiveness so if you’re unsure of whether CMNA is a good fit for your work you can:

1. contact a member of the organising committee, or
2. explore our archives at the CMNA.info site or
3. survey a selection of papers from the CEUR archive of previous CMNA workshops:
   • Volume #3769 (CMNA'25),
   • Volume #3769 (CMNA'24),
   • Volume #3614 (CMNA'23),
   • Volume #3205 (CMNA'22),
   • Volume #2937 (CMNA'21),
   • Volume #2269 (CMNA'20),
   • Volume #2346 (CMNA'19),
   • Volume #2048 (CMNA'17),
   • Volume #1876 (CMNA'16)

Downloadable Calls for Papers (CFP)

This site covers all of the material in the CFP, but if you want a PDF version for offline use, feel free to grab one of these:

Workshop Submissions

All submission types will be handled by the Conference Management Toolkit (CMT). Please submit your papers, demos, and posters via CMT using the following link:

Workshop Categories

The workshop encourages submissions spanning a number of categories:

• Long papers, either reporting on completed work or offering a polemic discussion on a burning issue (up to 10 pages).
• Short papers describing work in progress (up to 5 pages).
• Demos (2 page abstract describing the demo)
• Position Statement(2 page abstract establishing a research position).
• Late breaking results (2 page abstract reporting the results).

All submissions may also use as many additional pages as are necessary for references.

All accepted submissions will be archived locally on this site. Long & short papers will also be archved through CEUR workshop proceedings. Demos & posters will only be archived locally.

It is highly recommended, but not mandatory, to format papers using the CEUR Single Column Style (more details below in the style section).

Contribution Style

For final proceedings submission we’ll use the CEUR styles specifically the single column style from this page. It is recommended that you prepare your submission for review using this style.

If the following don’t download automatically then please right click on the required link and select “save link as…” from the pop-up menu.

• For LaTeX users: Use the Overleaf CEUR LaTeX template or download the zip archive for offline LaTeX compilation.
• For Open Document Format users: ODT Template
• For Word Users: DOCX Template

Pre-Proceedings Publication

We’ve gotten into the habit recently of publishing pre-proceedings shortly before the workshop so that folk can attend having prepared for the workshop, knowing what to expect, and being ready to engage with the presented work.

So we plan to publish proceedings for CMNA 26 through CEUR Workshop Proceedings as has happened in previous years, but should there be a delay, we’ll pre-publish papers here for use during the workshop.

Regular Topics

The CMNA workshop series focuses on the general issue of modelling “natural” argumentation.

Contributions are solicited addressing, but not limited to, the following areas of interest:

• The characteristics of “natural” arguments (e.g. ontological aspects, cognitive issues, legal aspects).
• The linguistic characteristics of natural argumentation, including discourse markers, sentence format, referring expressions, and style.
• The generation of natural argument.
• Corpus argumentation results and techniques.
• Argumentation mining.
• Models of natural legal argument.
• Rhetoric and affect: the role of emotions, personalities, etc. in argumentation.
• The roles of licentiousness and deceit and the ethical implications of implemented systems demonstrating such features.
• Natural argumentation in multi-agent systems.
• Methods to better convey the structure of complex argument, including representation and summarisation.
• Natural argumentation and media: visual arguments, multi-modal arguments, spoken arguments.
• Evaluative arguments and their application in AI systems (such as decision-support and advice-giving).
• Non-monotonic, defeasible and uncertain argumentation.
• The computational use of models from informal logic and argumentation theory.
• Computer supported collaborative argumentation, for pedagogy, e-democracy and public debate.
• Tools for interacting with structures of argument.
• Applications of argumentation based systems.