MorphNLI: A Stepwise Approach to Natural Language Inference Using Text Morphing

Vlad Andrei Negru, Robert Vacareanu, Camelia Lemnaru, Mihai Surdeanu, Rodica Potolea


Abstract
We introduce MorphNLI, a modular step-by-step approach to natural language inference (NLI). When classifying the premise-hypothesis pairs into entailment, contradiction, neutral, we use a language model to generate the necessary edits to incrementally transform (i.e., morph) the premise into the hypothesis. Then, using an off-the-shelf NLI model we track how the entailment progresses with these atomic changes, aggregating these intermediate labels into a final output. We demonstrate the advantages of our proposed method particularly in realistic cross-domain settings, where our method always outperforms strong baselines with improvements up to 12.6% (relative). Further, our proposed approach is explainable as the atomic edits can be used to understand the overall NLI label.
Anthology ID:
2025.findings-naacl.385
Volume:
Findings of the Association for Computational Linguistics: NAACL 2025
Month:
April
Year:
2025
Address:
Albuquerque, New Mexico
Editors:
Luis Chiruzzo, Alan Ritter, Lu Wang
Venue:
Findings
SIG:
Publisher:
Association for Computational Linguistics
Note:
Pages:
6938–6953
Language:
URL:
https://preview.aclanthology.org/fix-sig-urls/2025.findings-naacl.385/
DOI:
Bibkey:
Cite (ACL):
Vlad Andrei Negru, Robert Vacareanu, Camelia Lemnaru, Mihai Surdeanu, and Rodica Potolea. 2025. MorphNLI: A Stepwise Approach to Natural Language Inference Using Text Morphing. In Findings of the Association for Computational Linguistics: NAACL 2025, pages 6938–6953, Albuquerque, New Mexico. Association for Computational Linguistics.
Cite (Informal):
MorphNLI: A Stepwise Approach to Natural Language Inference Using Text Morphing (Negru et al., Findings 2025)
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https://preview.aclanthology.org/fix-sig-urls/2025.findings-naacl.385.pdf