Unverified50% confidenceFactExact time
A "ghost document" phenomenon exists: outdated process descriptions may rank higher than the latest version due to their dense keywords, while the retrieval system cannot detect document expiration.
1
Sources
50%
Confidence
Long-term
Relevance
10/2/2026
First Seen
Sources
Related Entities
Related Claims
UnverifiedWhen the history contains updates and contradictions, pure retrieval solutions will fail—even if the retrieval itself is perfect, the returned answer may still be wrong.73% similarUnverifiedFailure of vector indexes to reflect data changes in a timely manner leads to two types of problems: stale retrieval (generating answers based on outdated documents) and ghost data (source documents have been deleted but vectors remain in the index and are still retrieved).70% similarUnverifiedStuffing large amounts of historical records into a prompt not only incurs token costs, but may also cause important information to be drowned out due to attention dilution, producing worse results than a curated short summary.70% similar
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