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Heu-Jeoung Lim

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#artificial intelligence Preprint Oct 2026

ThinkFuse: Trajectory-Aware Test-Time Fusion for Small Reasoning Models

Small reasoning models (SRMs) have shown strong performance on complex reasoning tasks by generating extended chain-of-thought trajectories, but they often fail to recover once their reasoning enters an erroneous path. Existing test-time fusion methods rely on local fusion signals to determine when to trigger fusion, w...

Myunghoon Kang, Jungseob Lee, Jaehyung Seo et al. · 0 citations
Open access Sep 2026

Large Language Models Create Hallucinations in Response to Negated Text

It is demonstrated that LLMs struggle to handle negation effectively, applying affirmative knowledge inappropriately, leading to hallucinations that contradict the negated input, compromising the logical consistency and factual accuracy of LLM outputs.

Jaehyung Seo, Hyeonseok Moon, Heu-Jeoung Lim · 0 citations
#artificial intelligence Preprint Oct 2026

Distilling Directional Verification

Directional verification mitigates the transfer of errors from teacher-generated answers to students by providing more accurate training targets, and introduces directional label distillation, in which frozen teachers score candidate answers in that known direction and the best-scoring candidate becomes the student's t...

Jungseob Lee, Sugyeong Eo, Seongtae Hong et al. · 0 citations
#machine learning Preprint Sep 2026

Faster Block-Diffusion Serving with Distribution-Free Risk Guarantees

Redline is a finite-sample procedure that selects operating points, hand-picked or learned, from the correctness of their answers on calibration prompts, and keeps the reference-relative risk, the joint probability that the reference answers correctly and a candidate configuration does not, within a user-chosen budget...

Jungseob Lee, D. Lee, Chanjun Park et al. · 2 citations
Jul 2026

Answer-Conditioned Chains of Thought Degrade Verifiable-Reasoning Distillation in Large Language Models

This work shows that training a strong instruction-tuned reasoning model on its own answer-conditioned chains sharply lowers its verifiable-reasoning accuracy, and generates answer-blind data, because no correctness filter can see this damage in the data.

Jungseob Lee, Seungyoon Lee, Suhyune Son et al. · 0 citations

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