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News/Ruling Out to Rule In: Contrastive Hypothesis Retrieval for Medical Question Answering
arxiv
PublishedJuly 20, 2026 at 4:00 AM

Ruling Out to Rule In: Contrastive Hypothesis Retrieval for Medical Question Answering

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arXiv:2604.04593v2 Announce Type: replace-cross Abstract: Retrieval-augmented generation (RAG) grounds large language models in external medical knowledge, yet standard retrievers frequently surface hard negatives that are semantically close to the query but describe clinically distinct conditions.

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