167 wrong answers had complete evidence: ChronoRAG-G shows retrieval isn't the bottleneck

LowAd8593 · reddit · 2026-11-09

A temporal RAG experiment found that retrieving the right evidence doesn't mean an agent can use it correctly. When figures are revised or a corpus holds multiple report versions, agents mix quarters or miss required values even with correct-looking citations — the system fails to preserve what each piece of evidence must answer.

The author built ChronoRAG-G using OETRA (Obligation-Explicit Temporal Retrieval and Allocation): break questions into explicit evidence obligations, retrieve per obligation instead of pooled top-k, store entity identity/temporal relations/provenance in a graph corpus, verify evidence against required entity-metric-period, then allocate compatible evidence to answer slots before structured generation.

Evaluated on 1,005 temporal QA questions over 480 revised earnings-call transcripts: 80.70% audited answer accuracy, 95.92% strict slot coverage. Key finding: 167 incorrect answers still had complete evidence traces — evidence completeness and correct evidence usage are separate problems, so improving retrieval alone won't fix the rest. Code and an interactive demo are public; validated only on financial temporal QA so far.

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