LLM Doesn't Know What It Doesn't Know: Detecting Epistemic Blind Spots via Cross-Model Attribution Divergence on Clinical Tabular Data
Researchers demonstrate that Large Language Models lack genuine self-awareness regarding their knowledge limitations when applied to clinical tabular data, using cross-model attribution divergence to detect epistemic blind spots. LLM confidence scores remain constant regardless of actual accuracy, while a novel cross-model calibrator achieves reliable uncertainty quantification without model access or retraining.