N. Gagan

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Publication activitypapers/week, last 8 weeks

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Eval Frameworks & Benchmarks (1)Natural Language Processing (1)Recommendation & Information Retrieval (1)

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S. Sahoo (1)Soumya Ranjan Sahoo (1)Gagan N. (1)Sanand Sasidharan (1)

Papers (1)

Mar 18, 2026

GE HealthCare2w ago

Negation is Not Semantic: Diagnosing Dense Retrieval Failure Modes for Trade-offs in Contradiction-Aware Biomedical QA

Seemingly sophisticated dense retrieval methods can catastrophically fail at contradiction detection due to "Semantic Collapse," highlighting the surprising effectiveness of a simple, decoupled lexical approach for reliable biomedical QA.

S. Sahoo, Soumya Ranjan Sahoo, N. Gagan +3

Eval Frameworks & Benchmarks Natural Language Processing Recommendation & Information Retrieval

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N. Gagan

Publication activitypapers/week, last 8 weeks

Research focus

Frequent co-authors

Papers (1)