Accurate Legal Reasoning at Scale: Neuro-Symbolic Offloading and Structural Auditability for Robust Legal Adjudication

Stanisław Sójka, Witold Kowalczyk


Abstract
Legal texts often contain computational legal clauses—provisions whose understanding requires complex logic. While frontier Large Reasoning Models (LRMs) can describe such clauses, building production-ready systems is limited by reasoning errors and the high cost of inference. We propose Amortized Intelligence, a neuro-symbolic approach where we use an LLM once to translate a legal text into Deterministic Autonomous Contract Language (DACL): a typed graph intermediate representation. Adjudication then relies on deterministic graph executions with a visually auditable trace. In comparison against runtime LRM baselines (including GPT-5.2 and Gemini 3 Pro), our DACL-based Agent achieves near-perfect consistency and mitigates the "reasoning cliff" observed in probabilistic models. The system reduces compute costs by over 90% in high-volume workflows while satisfying the strict auditability requirements of legal adjudication.
Anthology ID:
2026.acl-industry.102
Volume:
Proceedings of the 64th Annual Meeting of the Association for Computational Linguistics (ACL 2026)
Month:
July
Year:
2026
Address:
San Diego, California, USA
Editors:
Yunyao Li, Georg Rehm, Mei Tu
Venue:
ACL
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Publisher:
Association for Computational Linguistics
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Pages:
1469–1482
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URL:
https://preview.aclanthology.org/ingest-acl/2026.acl-industry.102/
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Cite (ACL):
Stanisław Sójka and Witold Kowalczyk. 2026. Accurate Legal Reasoning at Scale: Neuro-Symbolic Offloading and Structural Auditability for Robust Legal Adjudication. In Proceedings of the 64th Annual Meeting of the Association for Computational Linguistics (ACL 2026), pages 1469–1482, San Diego, California, USA. Association for Computational Linguistics.
Cite (Informal):
Accurate Legal Reasoning at Scale: Neuro-Symbolic Offloading and Structural Auditability for Robust Legal Adjudication (Sójka & Kowalczyk, ACL 2026)
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https://preview.aclanthology.org/ingest-acl/2026.acl-industry.102.pdf