Medico: Towards Hallucination Detection and Correction with Multi-source Evidence Fusion
This addresses the issue of factual inaccuracies in LLMs for applications requiring reliable information, representing a strong specific gain rather than a foundational breakthrough.
The paper tackles the problem of hallucinations in Large Language Models by proposing Medico, a framework that detects and corrects factual errors using multi-source evidence fusion, achieving high performance with metrics like 0.951 F1 in detection and 0.979 approval rate in correction.
As we all know, hallucinations prevail in Large Language Models (LLMs), where the generated content is coherent but factually incorrect, which inflicts a heavy blow on the widespread application of LLMs. Previous studies have shown that LLMs could confidently state non-existent facts rather than answering ``I don't know''. Therefore, it is necessary to resort to external knowledge to detect and correct the hallucinated content. Since manual detection and correction of factual errors is labor-intensive, developing an automatic end-to-end hallucination-checking approach is indeed a needful thing. To this end, we present Medico, a Multi-source evidence fusion enhanced hallucination detection and correction framework. It fuses diverse evidence from multiple sources, detects whether the generated content contains factual errors, provides the rationale behind the judgment, and iteratively revises the hallucinated content. Experimental results on evidence retrieval (0.964 HR@5, 0.908 MRR@5), hallucination detection (0.927-0.951 F1), and hallucination correction (0.973-0.979 approval rate) manifest the great potential of Medico. A video demo of Medico can be found at https://youtu.be/RtsO6CSesBI.