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Jia-Wei Zhang

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#natural language process... Preprint Sep 2026

When the Wrong Key Wins: Understanding and Detecting Hallucinations in LLMs

Large language models can hallucinate even when the knowledge required for a correct answer is already available. We study this failure through a latent-key view of inference, where answer selection depends on competition among associations acquired during pretraining. We show that model predictions can be highly sensi...

Xu-Han Tong, Hao-Yue Bai, Da-Wei Zhou et al. · 0 citations

#protein folding Preprint Aug 2026

Off-Manifold Collapse in Guided Protein Language Models

A cheap density prior is introduced over natural protein activations and keeps only the candidates that remain typical under it, a training-free post-hoc step the authors call Mahalanobis filtering that improves both the property score and the structural plausibility of the sequences it keeps at negligible cost, withou...

Shuibai Zhang, Xin-Chi Liu, Fred Zhangzhi Peng et al. · 0 citations