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cs.CL2026
Stale-Document Poisoning: When Outdated Retrieval Overrides Correct Model Answers
Md Shamim Ahmed, Lukas Galke Poech, Richard Röttger
Retrieval-augmented generation (RAG) is often used to address outdated knowledge by providing external evidence. But retrieval helps only when that evidence is still valid. We iden…
cs.CL2026
ChronoMedKG: A Temporally-Grounded Biomedical Knowledge Graph and Benchmark for Clinical Reasoning
Md Shamim Ahmed, Farzaneh Firoozbakht, Lukas Galke Poech +2
Biomedical knowledge graphs (KGs) treat disease associations as static facts, but temporal information is crucial for clinical reasoning, e.g., a symptom diagnostic of one disease…