Verify with Caution: The Pitfalls of Relying on Imperfect Factuality Metrics (2025.findings-acl)
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| Challenge: | Recent advances in large language models have led to optimism that they can serve as reliable evaluators of natural language outputs. |
| Approach: | They propose to use factuality metrics to evaluate natural language outputs . they find they misestimate the factual accuracy of NLG systems . |
| Outcome: | The proposed metrics are inconsistent with each other and often misestimate the factual accuracy of NLG systems, causing biases against paraphrased outputs and outputs that draw upon faraway parts of the source documents. |
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