Challenge: Existing logic reasoning benchmarks are limited in language diversity and their distributions are deviated from ideal distributions, which may lead to biased evaluation results.
Approach: They propose a new logic benchmark DivLogicEval that uses natural sentences to evaluate logical reasoning .
Outcome: The proposed evaluation metric mitigates bias and randomness inherent in LLMs.

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LogicBench: Towards Systematic Evaluation of Logical Reasoning Ability of Large Language Models (2024.acl-long)

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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.
Towards Reasoning in Large Language Models: A Survey (2023.findings-acl)

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Challenge: Reasoning is a fundamental aspect of human intelligence that plays a crucial role in many intellectual activities.
Approach: They propose to improve LLMs' ability to elicit reasoning by providing exemplars or prompts to model reasoning.
Outcome: This paper provides a comprehensive overview of the state of knowledge on reasoning in large language models.
Multi-LogiEval: Towards Evaluating Multi-Step Logical Reasoning Ability of Large Language Models (2024.emnlp-main)

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Challenge: Existing logical reasoning evaluation benchmarks focus on simplistic single-step or multi-step reasoning with limited set of inference rules.
Approach: They propose to use a multi-step logical reasoning evaluation dataset to measure their ability for human-like multi- step logical thinking.
Outcome: The proposed dataset covers three logic types including propositional, first-order, and non-monotonic logic with various inference rules and depths.
LogicAsker: Evaluating and Improving the Logical Reasoning Ability of Large Language Models (2024.emnlp-main)

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Challenge: LogicAsker examines and improves the reasoning abilities of large language models such as ChatGPT and GPT-4.
Approach: They propose a set of atomic reasoning skills grounded in propositional and predicate logic to examine and improve the reasoning abilities of large language models such as ChatGPT and GPT-4.
Outcome: The proposed approach improves reasoning abilities in large language models such as ChatGPT and GPT-4 by up to 5%.
Natural Language Reasoning in Large Language Models: Analysis and Evaluation (2025.findings-acl)

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Challenge: Argumentative reasoning presents unique challenges due to its reliance on context, implicit assumptions, and value judgments.
Approach: They propose a large-scale evaluation of LLMs' unconstrained natural language reasoning capabilities . they formalise a new strategy designed to evaluate argumentative reasoning in LLM .
Outcome: The proposed model performs better on a range of reasoning tasks than other models.
Do Large Language Models excel in Complex Logical Reasoning with Formal Language? (2025.emnlp-main)

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Challenge: Existing studies on LLMs have focused on formal language, but evaluations of their performance are limited.
Approach: They propose to use a formal language to evaluate LLMs across logical reasoning problems using formal languages.
Outcome: The proposed model outperforms Instruct models in three dimensions, taxonomy of tasks, and format of trajectories, and achieves the best generalization performance across other languages.
NPHardEval: Dynamic Benchmark on Reasoning Ability of Large Language Models via Complexity Classes (2024.acl-long)

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Challenge: Complex reasoning ability is one of the most important features of Large Language Models.
Approach: They propose a new benchmark that measures the reasoning ability of Large Language Models . it contains 900 algorithmic questions belonging to the NP-Hard complexity class .
Outcome: The proposed benchmark contains 900 questions belonging to the NP-Hard complexity class and is updated on a monthly basis.
Evaluating the Performance of Large Language Models via Debates (2025.findings-naacl)

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Challenge: Large Language Models (LLMs) are evolving and impacting various fields . current methods for evaluation are based on fixed, domain-specific questions or rely on human input, making them unscalable.
Approach: They propose a benchmarking framework based on debates between LLMs, judged by another LLM.
Outcome: The proposed framework achieves rankings that align closely with popular rankings based on human input eliminating the need for costly crowdsourcing.
Dissecting Logical Reasoning in LLMs: A Fine-Grained Evaluation and Supervision Study (2025.findings-emnlp)

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Challenge: Existing benchmarks that rely on final-answer accuracy fail to capture the quality of the reasoning process.
Approach: They propose a fine-grained evaluation framework that assesses logical reasoning across three dimensions: overall accuracy, stepwise soundness, and representation-level probing.
Outcome: The proposed framework assesses logical reasoning across three dimensions: overall accuracy, stepwise soundness, and representation-level probing.
Reasoning in a Combinatorial and Constrained World: Benchmarking LLMs on Natural-Language Combinatorial Optimization (2026.findings-acl)

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Challenge: NLCO evaluates large language models for combinatorial optimization (CO) . existing evaluations emphasize relatively simple reasoning competencies .
Approach: They propose a combinatorial optimization benchmark that evaluates large language models on CO reasoning.
Outcome: The proposed model can handle combinatorial optimization without writing code or calling external solvers.

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