How Well Can Reasoning Models Identify and Recover from Unhelpful Thoughts?

Sohee Yang; Sang-Woo Lee; Nora Kassner; Daniela Gottesman; Sebastian Riedel; Mor Geva

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arXiv · 2506.10979

How Well Can Reasoning Models Identify and Recover from Unhelpful Thoughts?

Sohee Yang·Sang-Woo Lee·Nora Kassner·Daniela Gottesman·Sebastian Riedel·Mor Geva

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Abstract

Recent reasoning models show the ability to reflect, backtrack, and self-validate their reasoning, which is crucial in spotting mistakes and arriving at accurate solutions. A natural question that arises is how effectively models can perform such self-reevaluation. We tackle this question by investigating how well reasoning models identify and recover from four types of unhelpful thoughts: uninformative rambling thoughts, thoughts irrelevant to the question, thoughts misdirecting the question as a slightly different question, and thoughts that lead to incorrect answers. We show that models are effective at identifying most unhelpful thoughts but struggle to recover from the same thoughts when these are injected into their thinking process, causing significant performance drops. Models tend to naively continue the line of reasoning of the injected irrelevant thoughts, which showcases that their self-reevaluation abilities are far from a general "meta-cognitive" awareness. Moreover, we observe non/inverse-scaling trends, where larger models struggle more than smaller ones to recover from short irrelevant thoughts, even when instructed to reevaluate their reasoning. We demonstrate the implications of these findings with a jailbreak experiment using irrelevant thought injection, showing that the smallest models are the least distracted by harmful-response-triggering thoughts. Overall, our findings call for improvement in self-reevaluation of reasoning models to develop better reasoning and safer systems.

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Sohee Yang, Sang-Woo Lee, Nora Kassner, Daniela Gottesman, Sebastian Riedel, Mor Geva. 2025-06-12. How Well Can Reasoning Models Identify and Recover from Unhelpful Thoughts?. https://arxiv.org/abs/2506.10979

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