Weiwei Chen · Sun Yat-sen University

How can we
reason together?

I study how individual arguments, judgments, and preferences can become rational collective decisions.

Associate Professor · Institute of Logic and Cognition

Logic. Argumentation. Collective choice.

The research question

From individual arguments.
To collective decisions.

Combining reasonable views does not automatically produce a reasonable whole. I use formal models to understand what we can preserve, what we must give up, and how collective reasoning can evolve.

Preserve what matters.

Semantic properties, rationality, and admissibility under aggregation.

Find the conditions for possibility.

Structural restrictions and the boundaries of collective argumentation.

Reason through change.

Revision, contraction, and dynamic collective argumentation.

More about my research

I am an associate professor at the Institute of Logic and Cognition and Department of Philosophy, Sun Yat-sen University, China.

My research studies formal models of collective argumentation and their connections to social choice theory, logic, and artificial intelligence. I ask how individual argumentation frameworks, judgments, preferences, or votes can be aggregated into collective outcomes while preserving rationality, semantic, and strategic properties.

Recent work develops preservation results for collective argumentation, topological restrictions that avoid impossibility results, dynamic revision and contraction operators, proportional acceptability, and strategyproof collective argumentation.

Collective argumentation
Formal argumentation semantics
Social choice and aggregation
Logic and AI
Dynamic and strategic reasoning

Same views. Different outcomes.

Person 1

Person 2

Person 3

Majority rule · at least 2 of 3 people

Collective framework

Each person’s graph is acyclic. Majority voting creates a cycle in the collective graph: a → b → c → a.

Illustrative example · Arrows represent attacks between arguments.

Selected work

Five papers.
A connected research programme.

All publications

FoundationsArtificial Intelligence · 2019

What survives when arguments are combined?

Studies which semantic properties can be preserved when individual argumentation frameworks are aggregated into a collective framework.

Preservation of Semantic Properties in Collective Argumentation: The Case of Aggregating Abstract Argumentation Frameworks

Weiwei Chen and Ulle Endriss

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Cite this paper

@article{Chen2019Preservation,
  author = {Chen, Weiwei and Endriss, Ulle},
  title = {Preservation of Semantic Properties in Collective Argumentation: The Case of Aggregating Abstract Argumentation Frameworks},
  journal = {Artificial Intelligence},
  year = {2019},
  volume = {269},
  pages = {27--48},
  doi = {10.1016/j.artint.2018.10.006}
}

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02Journal of Logic and Computation · 2026

A closer look at admissibility.

Extends the study of semantic preservation through solid admissibility and related argumentation semantics.

Argumentation Semantics Based on Solid Admissibility and Preservation of Semantic Properties

Xiaolong Liu, Weiwei Chen, and Sylvie Doutre

View at publisher DOI

Cite this paper

@article{Chen2026Solid,
  author = {Liu, Xiaolong and Chen, Weiwei and Doutre, Sylvie},
  title = {Argumentation Semantics Based on Solid Admissibility and Preservation of Semantic Properties},
  journal = {Journal of Logic and Computation},
  year = {2026},
  volume = {36},
  number = {2},
  pages = {exag003},
  doi = {10.1093/logcom/exag003}
}

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03International Journal of Approximate Reasoning · 2024

Collective reasoning that can change.

Constructs revision and contraction operators for updating collective argumentation as information changes.

Dynamic Collective Argumentation: Constructing the Revision and Contraction Operators

Weiwei Chen and Shier Ju

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Cite this paper

@article{Chen2024Dynamic,
  author = {Chen, Weiwei and Ju, Shier},
  title = {Dynamic Collective Argumentation: Constructing the Revision and Contraction Operators},
  journal = {International Journal of Approximate Reasoning},
  year = {2024},
  volume = {172},
  pages = {109234},
  doi = {10.1016/j.ijar.2024.109234}
}

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04Journal of Logic and Computation · 2023

When structure makes a difference.

Examines how topological restrictions on argumentation frameworks can enable positive aggregation results.

Collective Argumentation with Topological Restrictions: The Case of Aggregating Abstract Argumentation Frameworks

Weiwei Chen

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Cite this paper

@article{Chen2023Topology,
  author = {Chen, Weiwei},
  title = {Collective Argumentation with Topological Restrictions: The Case of Aggregating Abstract Argumentation Frameworks},
  journal = {Journal of Logic and Computation},
  year = {2023},
  volume = {33},
  number = {2},
  pages = {319--343},
  doi = {10.1093/logcom/exac100}
}

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05Journal of Logic and Computation · 2021

Constraints that protect admissibility.

Investigates the preservation of admissibility under rationality and feasibility constraints.

Guaranteeing Admissibility of Abstract Argumentation Frameworks with Rationality and Feasibility Constraints

Weiwei Chen

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Cite this paper

@article{Chen2021Admissibility,
  author = {Chen, Weiwei},
  title = {Guaranteeing Admissibility of Abstract Argumentation Frameworks with Rationality and Feasibility Constraints},
  journal = {Journal of Logic and Computation},
  year = {2021},
  volume = {31},
  number = {8},
  pages = {2133--2158},
  doi = {10.1093/logcom/exab011}
}

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The full bibliography

Publications & books.

Journal articles, conference papers, books, and chapters. DBLP indexes a partial subset of my computer-science-related work.

Journal articles & conference papers

Weiwei Chen, Semantic Preservation and Strategic Robustness in Extension Aggregation. In Proceedings of the 23rd Pacific Rim International Conference on Artificial Intelligence (PRICAI 2026), forthcoming.
Weiwei Chen and Xiaolong Liu, Collective Argumentation with Labellings: A Dynamic Impossibility Perspective. Proceedings of the Sixth International Workshop on Logics and Argumentation for New-Generation Artificial Intelligence (LNGAI 2026). College Publications, pp. 60–76, 2026.
Yutong Yi and Weiwei Chen, External Semantics for Argumentation Frameworks. Proceedings of the 11th International Conference on Computational Models of Argument (COMMA 2026). Frontiers in Artificial Intelligence and Applications vol. 428. IOS Press, 2026. DOI
Xiaolong Liu, Weiwei Chen, and Sylvie Doutre, Argumentation Semantics Based on Solid Admissibility and Preservation of Semantic Properties. Journal of Logic and Computation, 36(2): exag003, 2026. DOI
Xiaolong Liu and Weiwei Chen, Proportional Acceptability of Arguments. Proceedings of CLAR-2025. LNCS vol. 15712. Springer, pp. 254–271, 2025. DOI
Weiwei Chen and Shier Ju, Dynamic Collective Argumentation: Constructing the Revision and Contraction Operators. International Journal of Approximate Reasoning, vol. 172, 2024. DOI
Xiaolong Liu and Weiwei Chen, On the Proportional Acceptability of Arguments in Abstract Argumentation. Proceedings of the 10th International Conference on Computational Models of Argument, 2024.
Zhe Yu, Shier Ju, and Weiwei Chen, Context-based Argumentation Frameworks and Multi-Agent Consensus Building. Journal of Logic and Computation, 34(2): 199–228, 2024. DOI
Weiwei Chen, Collective Argumentation with Topological Restrictions: The Case of Aggregating Abstract Argumentation Frameworks. Journal of Logic and Computation, 33(2): 319–343, 2023. DOI
Weiwei Chen, Collective Argumentation with Topological Restrictions. Proceedings of CLAR-2021. LNCS vol. 13040. Springer, pp. 79–93, 2021. DOI
Xiaolong Liu and Weiwei Chen, Solid Semantics for Abstract Argumentation Frameworks and the Preservation of Solid Semantic Properties. Proceedings of EUMAS-2021. LNCS vol. 12802. Springer, pp. 178–193, 2021. DOI
Weiwei Chen, Collective Argumentation: The Case of Aggregating Support-Relations of Bipolar Argumentation Frameworks. Proceedings of TARK-2021. EPTCS 335: 87–102, 2021. DOI
Weiwei Chen, Guaranteeing Admissibility of Abstract Argumentation Frameworks with Rationality and Feasibility Constraints. Journal of Logic and Computation, 31(8): 2133–2158, 2021. DOI
Xiaolong Liu and Weiwei Chen, Solid Semantics and Extension Aggregation Using Quota Rules under Integrity Constraints. Proceedings of AAMAS-2021, 2021.
Weiwei Chen, Aggregation of Support-Relations of Bipolar Argumentation Frameworks. Proceedings of AAMAS-2020, 2020.
Weiwei Chen, Preservation of Admissibility with Rationality and Feasibility Constraints. Proceedings of CLAR-2020. LNAI vol. 12061. Springer, pp. 245–258, 2020. DOI
Weiwei Chen and Ulle Endriss, Preservation of Semantic Properties in Collective Argumentation: The Case of Aggregating Abstract Argumentation Frameworks. Artificial Intelligence, 269: 27–48, 2019. DOI
Weiwei Chen and Ulle Endriss, Aggregating Alternative Extensions of Abstract Argumentation Frameworks: Preservation Results for Quota Rules. Proceedings of COMMA-2018. Frontiers in AI and Applications vol. 305. IOS Press, pp. 425–436, 2018. DOI
Weiwei Chen and Ulle Endriss, Preservation of Semantic Properties during the Aggregation of Abstract Argumentation Frameworks. Proceedings of TARK-2017. EPTCS 251: 118–133, 2017. DOI

Books and Book Chapters

陈伟伟, 《论辩聚合：社会选择理论的新视角》. 人民出版社, forthcoming.
陈伟伟, 《阿姆斯特丹大学的逻辑学传统与硕士教育》. 载《哲学教育评论（第三辑）：逻辑学专辑——推古论今辩东西》, 张伟主编, 刘海林执行主编, 商务印书馆, 2025. Book notice
刘小龙、陈伟伟, 《论证挖掘与论证形式化》第十二章. 鞠实儿等著, 科学出版社, 2022.
陈伟伟 and Ulle Endriss, 《融合与修正：跨文化交流的逻辑与认知研究》第五章. 鞠实儿等著, 经济科学出版社, 2020.

Selected Talks

Axiom- and Data-Driven Collective Argumentation. Ruohai Logic Forum, Sun Yat-sen University, Zhuhai, China, May 2026. [Event page]
Constructing the Revision and Contraction Operators for Dynamic Collective Argumentation. The 3rd International Workshop on Logic for Multi-Agent Systems, Zhejiang, China, June 2024.
Collective Argumentation: Static and Dynamic Perspectives. Seminar at PKU Center of Logic, Language, and Cognition, Beijing, China, Mar. 2024. [Event page]
Dynamically Rational Collective Argumentation. The 3rd International Workshop on Logic and Philosophy, Beijing, China, May 2024. [Event page]
Dynamic Collective Argumentation. Trends in Logic, Online, Nov. 2023. [Event page]
Applying the Axiomatic Method to Collective Argumentation. Individual and Collective Reasoning Group Seminar, University of Luxembourg, Feb. 2022.
Collective Argumentation with Topological Restrictions. CLAR-2021, Online, Oct. 2021. [Event page]
Collective Argumentation: The Case of Aggregation of Support-Relations of Bipolar Argumentation Frameworks. TARK-2021, Online, June 2021.
Aggregation of Support-Relations of Bipolar Argumentation Frameworks. AAMAS-2020, Online, May 2020.
Aggregating Extensions of Abstract Argumentation Frameworks. Computational Social Choice Seminar, ILLC, University of Amsterdam, Sept. 2018. [Event page]
What Can We Expect from Consensus Decision-making? Cool Logic Seminar, University of Amsterdam, Sept. 2017. [Event page]

Research Grants

公理化群体论辩的可能性和防操纵性研究. Natural Science Foundation of Guangdong, China, 2024A1515012540.
基于社会选择方法的论辩聚合理论研究. National Social Science Fund of China, 22FZXB093.
公理化群体论辩理论. Ministry of Education of China, Humanities and Social Sciences Youth Fund, 22YJC72040001.
形式论辩中的双极论辩框架与分级论辩语义聚合研究. China Postdoctoral Science Foundation, 2019M663352.

Service

Program committee member: AAMAS, ECAI, IJCAI, PRICAI, CLAR, and LNGAI.
Reviewer: Autonomous Agents and Multi-Agent Systems, Journal of Applied Non-Classical Logics, and Studies in Logic.

Students

I welcome MA students interested in formal argumentation, social choice theory, logic in AI, computational models of argument, and collective decision-making.

Continue the conversation

Questions worth
reasoning about. Together.

For research discussions, collaboration, or MA supervision, get in touch.

Get in touch Google Scholar

From individual arguments.To collective decisions.

Preserve what matters.

Find the conditions for possibility.

Reason through change.

Five papers.A connected research programme.

What survives when arguments are combined?

A closer look at admissibility.

Collective reasoning that can change.

When structure makes a difference.

Constraints that protect admissibility.

Publications & books.

Journal articles & conference papers

Books and Book Chapters

Selected Talks

Research Grants

Service

Students

Questions worthreasoning about. Together.

From individual arguments.
To collective decisions.

Five papers.
A connected research programme.

Questions worth
reasoning about. Together.