YNJTC at SemEval-2026 Task 11: A Neuro-Symbolic Hybrid Pipeline for Content-Independent Syllogistic Reasoning

Junhao Fu, Yun He, Lina Zhao, Weijuan Li


Abstract
This paper presents a neuro-symbolic hybrid pipeline for SemEval-2026 Task 11 that addresses the content effect in syllogistic reasoning. The system converts natural-language syllogisms into formal mood-figure representations via regex parsing and LLM-powered extraction, then determines validity through symbolic table lookup against the 24 classically valid forms. The approach achieved a perfect Combined Score of 100.0 on Subtask 1 and competitive results on all four subtasks.
Anthology ID:
2026.semeval-1.54
Volume:
Proceedings of the 20th International Workshop on Semantic Evaluation (2026)
Month:
July
Year:
2026
Address:
San Diego, California, USA
Editors:
Ekaterina Kochmar, Debanjan Ghosh, Kai North, Mamoru Komachi
Venues:
SemEval | WS
SIG:
Publisher:
Association for Computational Linguistics
Note:
Pages:
367–372
Language:
URL:
https://preview.aclanthology.org/ingest-acl-workshops/2026.semeval-1.54/
DOI:
Bibkey:
Cite (ACL):
Junhao Fu, Yun He, Lina Zhao, and Weijuan Li. 2026. YNJTC at SemEval-2026 Task 11: A Neuro-Symbolic Hybrid Pipeline for Content-Independent Syllogistic Reasoning. In Proceedings of the 20th International Workshop on Semantic Evaluation (2026), pages 367–372, San Diego, California, USA. Association for Computational Linguistics.
Cite (Informal):
YNJTC at SemEval-2026 Task 11: A Neuro-Symbolic Hybrid Pipeline for Content-Independent Syllogistic Reasoning (Fu et al., SemEval 2026)
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PDF:
https://preview.aclanthology.org/ingest-acl-workshops/2026.semeval-1.54.pdf
Supplementarymaterial:
 2026.semeval-1.54.SupplementaryMaterial.zip