| Challenge: | Defeasible inferences are highly plausible but can be impacted by new information. |
| Approach: | They construct a dataset to evaluate defeasible reasoning about property inheritance . they use generics to represent the inheritance rules because their semantics include exceptions . |
| Outcome: | The proposed model performs poorly across all pattern types and achieves 0.64 F 1 . the best performing model only achieves F 1 and the model is not well tuned . |
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Thinking Like a Skeptic: Defeasible Inference in Natural Language (2020.findings-emnlp)
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Rachel Rudinger, Vered Shwartz, Jena D. Hwang, Chandra Bhagavatula, Maxwell Forbes, Ronan Le Bras, Noah A. Smith, Yejin Choi
| Challenge: | Defeasible inference is a mode of reasoning in which an inference may be weakened or overturned in light of new evidence. |
| Approach: | They propose a dataset for defeasible inference in natural language that includes extensions to existing inference datasets. |
| Outcome: | Defeasible NLI extends existing datasets for defeaasibility inference in natural language . generative models can weaken or strengthen inferences up to 68% of the time, it shows . |
Think about it! Improving defeasible reasoning by first modeling the question scenario. (2021.emnlp-main)
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| Challenge: | Existing literature suggests that a person forms a mental model of the problem scenario before answering questions. |
| Approach: | They propose to have a model first create a graph of relevant influences and leverage that graph as an additional input when answering a defeasible query. |
| Outcome: | The proposed model achieves state-of-the-art on three different defeasible reasoning datasets. |
Current Advances in LLM Reasoning (2026.acl-tutorials)
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| Challenge: | This tutorial examines comprehensive evaluation strategies to assess the reasoning abilities of large language models (LLMs) advanced inference time methods and post-training methods that aim to make LLMs think more like humans are discussed in this tutorial. |
| Approach: | This tutorial explores comprehensive evaluation strategies to assess the reasoning abilities of large language models (LLMs) and discusses two types of methods to improve models’ reasoning: advanced inference time methods, structured and self-improvement inference methods, and post-training methods, such as RLHF, DPO, and GRPO. |
| Outcome: | This tutorial examines evaluation strategies to assess the reasoning abilities of large language models and discusses two types of methods to improve models’ reasoning. |
LLM See, LLM Do: Leveraging Active Inheritance to Target Non-Differentiable Objectives (2024.emnlp-main)
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| Challenge: | Historically, high-quality labeled data has been costly to curate due to scarcity of available data and financial cost. |
| Approach: | They characterize the impact of passive inheritance of model properties by studying how the source of synthetic data shapes models’ internal biases, calibration and preferences, and their generations’ textual attributes. |
| Outcome: | The proposed model inheritance can increase lexical diversity or reduce toxicity. |
What Makes it Ok to Set a Fire? Iterative Self-distillation of Contexts and Rationales for Disambiguating Defeasible Social and Moral Situations (2023.findings-emnlp)
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Kavel Rao, Liwei Jiang, Valentina Pyatkin, Yuling Gu, Niket Tandon, Nouha Dziri, Faeze Brahman, Yejin Choi
| Challenge: | Moral or ethical judgments rely heavily on the contexts in which they occur . a student model that produces defeasible contexts with improved validity, diversity, and defasibility is superior to intermediate student models . |
| Approach: | a new study uses a student model to provide contextualizations that make an action morally acceptable . the model is based on a dataset of 115K defeasible moral actions rated highly by human annotators . |
| Outcome: | The proposed model outperforms all intermediate models in a high-quality dataset . the model is based on 1.2M entries of contextualizations and rationales for 115K moral actions . |
Could you give me a hint ? Generating inference graphs for defeasible reasoning (2021.findings-acl)
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| Challenge: | Defeasible reasoning is a mode of reasoning where conclusions can be overturned by taking into account new evidence. |
| Approach: | They propose to automatically generate inference graphs for a defeasible inference task by transfer learning from a related NLP task. |
| Outcome: | The proposed method generates meaningful graphs for a defeasible inference task and human accuracy improves by 20%. |
There’s No Such Thing as Simple Reasoning for LLMs (2025.findings-acl)
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| Challenge: | Existing work has focused on relatively complex “many-hop” reasoning problems. |
| Approach: | They analyse the performance of fine-tuned LLMs on simple reasoning problems . they find the models remain highly brittle, being susceptible to seemingly innocent perturbations . |
| Outcome: | The proposed models fail on simple reasoning problems, but are highly brittle . they are susceptible to seemingly innocent perturbations, such as adding duplicates to the set of premises and shuffling the order in which the premises are presented. |
LogicBench: Towards Systematic Evaluation of Logical Reasoning Ability of Large Language Models (2024.acl-long)
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Mihir Parmar, Nisarg Patel, Neeraj Varshney, Mutsumi Nakamura, Man Luo, Santosh Mashetty, Arindam Mitra, Chitta Baral
| Challenge: | Existing work investigating the logical reasoning ability of large language models has focused only on a couple of inference rules of propositional and first-order logics. |
| Approach: | They propose to use a natural language question-answering dataset to evaluate the logical reasoning ability of large language models. |
| Outcome: | The proposed model performs poorly on a range of natural language questions using chain-of-thought prompting. |
Are LLMs classical or nonmonotonic reasoners? Lessons from generics (2024.acl-short)
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| Challenge: | Recent research on nonmonotonic reasoning has provided evidence of impressive performance and flexible adaptation to machine generated or human critique. |
| Approach: | They propose to use generics to explain why birds fly and exceptions such as penguins don't fly to maintain stable beliefs on truth conditions of generics. |
| Outcome: | The proposed task features generics, such as ‘Birds fly’, and exceptions, ‘Penguins don’t fly’. |
Domaino1s: Guiding LLM Reasoning for Explainable Answers in High-Stakes Domains (2025.findings-acl)
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| Challenge: | Existing Large Language Models (LLMs) generate brief answers without reasoning processes and explanations. |
| Approach: | They propose supervised fine-tuning and tree search to enhance LLMs’ reasoning capabilities on domain tasks. |
| Outcome: | The proposed model improves on stock investment recommendation and legal reasoning QA tasks. |