一作ACL 2026Findings· Findings of ACL
Do LLM s Really Know What They Don’t Know? Internal States Mainly Reflect Knowledge Recall Rather Than Truthfulness
Chi Seng Cheang · Hou Pong Chan · Wenxuan Zhang · Yang Deng
摘要
Recent work suggests that LLMs “know what they don’t know”, positing that hallucinated and factually correct outputs arise from distinct internal processes and can therefore be distinguished using internal signals.However, hallucinations have multifaceted causes: beyond simple knowledge gaps, the...