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The 4th International Conference on Logic and Argumentation (CLAR 2021) invites contributions from logic, artificial intelligence, philosophy, computer science, linguistics, law, and other areas studying logic and formal argumentation.


CLAR 2021 will be held in Hangzhou, 20-22 October 2021 at Zhejiang University City College. Due to the uncertainties of the epidemiological situation, the conference will be held in a HYBRID format (virtual and physical attendance both accepted), and we encourage physical participation if possible.


Colocated event: Seminar on Logics for New-Generation Artificial Intelligence (NGL 2021, in Chinese)


Papers accepted to CLAR 2021 are published as Springer LNAI proceedings:

Pietro Baroni, Christoph Benzmüller, Yì N. Wáng (eds.)

Logic and Argumentation

Fourth International Conference, CLAR 2021, Hangzhou, China, October 20–22, 2021, Proceedings, LNAI, volume 13040.


and will be available online during the conference. Following the conference, we will produce a special issue in the Journal of Logic and Computation (JLC) on the topics covered at CLAR 2021. Selected contributors to CLAR 2021 will be invited to submit an extended version of their paper for this special issue of JLC.

CLAR 2021 special issue in the Journal of Logic and Computation 

As we have announced during the CLAR 2021 conference, a special issue is planned in the Journal of Logic and Computation (JLC, see https://academic.oup.com/logcom) presenting selected papers from the CLAR 2021 conference. Authors of selected papers from the CLAR 2021 conference have been contacted and encouraged to submit an extended version of their work to this planned special issue of JLC. If you have not received such an invitation, but nevertheless think that your work has further progressed and is sufficiently mature to justify submission to the planned special issue in JLC, please contact us (siclar2021@easychair.org).

Best regards, 

    Christoph, Pietro and Yi (Co-Editors of the CLAR 2021 special issue in JLC)

The CLAR 2021 conference will highlight recent advances in logic and argumentation and foster interaction between these areas within and outside China. Previous conferences can be accessed via: http://www.xixilogic.org/events/clar


List of Topics

Suggested topics include, but are not limited to the following:

* Abstract argumentation
* Applications of logic and/or argumentation
* Applied logic
* Argumentation and game theory
* Argumentation and law
* Argumentation and linguistics
* Argumentation and medical reasoning
* Argumentation in AI
* Argument mining
* Argumentation schemes
* BDI logic
* Computational argumentation
* Deontic logic
* Dynamic epistemic logic and belief revision
* Formal models for dialog and argumentation
* Informal logic
* Judgment aggregation
* Knowledge representation and reasoning
* Logic for game theory
* Logic for multi-agent systems
* Logic for semantic web
* Logic for social network
* Mathematical logic
* Modal logic
* Nonmonotonic logics
* Numerical and uncertainty reasoning
* Philosophical logic
* Pragma-Dialectics
* Preference logic
* Structured argumentation
* Uncertain argumentation


Submission Guidelines

We invite two types of submissions: full papers (12 – 20 pages) describing original and unpublished work and extended abstracts (5 – 8 pages) of preliminary original work or extended abstracts of already published work (needs to be highlighted along with the title), from either the field of logic or the field of formal argumentation. Additional support material may be included in an appendix, which may be considered or ignored by the program committee.

Submissions must be prepared in LaTeX, using the Springer LNCS style:


Submissions not complying with these guidelines will be desk rejected.

Papers in PDF format should be submitted via EasyChair:


Springer encourages authors to include their ORCIDs in their papers. In addition, the corresponding author of each paper, acting on behalf of all of the authors of that paper, must complete and sign a Consent-to-Publish form. The corresponding author signing the copyright form should match the corresponding author marked on the paper. Once the files have been sent to Springer, changes relating to the authorship of the papers cannot be made.

We encourage early registration of the title and abstract of your paper in easychair. Each submitted paper will be carefully peer-reviewed by a panel of PC members based on originality, significance, technical soundness, clarity of exposition and relevance for the conference. For each accepted paper, at least one author is expected to register and present the paper at the conference.


Important Dates

Submission: 30 June 2021
  11 July 2021
Notification: 13 August 2021
  16 August 2021
Camera-Ready: 23 August 2021
  31 August 2021
Conference: 20-22 October 2021

Invited Speakers

Anette Frank
(Heidelberg University, DE)
Giovanni Sartor
(U. of Bologna & EUI, IT)
Ken Satoh
(NII and Sokendai, JP)
Guillermo Simari
(Universidad Nacional del Sur, AR)
Minghui Xiong
(Zhejiang University, CN)



Zhejiang University
Zhejiang University City College



CLAR conference series
LNGAI 2021
NGL 2021 (colocated)