2026
SEMANTIC REFORMULATION ENTROPY FOR ROBUST HALLUCINATION DETECTION IN QA TASKS
Chaodong Tong, School of Cyber Security, Zhang Qi, Lei Jiang, Yanbing Liu, School of Cyber Security +2
ICASSP 2026poster
Reliable question answering with large language models (LLMs) is challenged by hallucinations, fluent but factually incorrect outputs arising from epistemic uncertainty. Existing entropy-based semantic-level uncertainty estimation methods are limited by sampling noise and unstable clustering of vari…