This failure implicates the training data's representation of sub-track-specific procedural logic versus general program conditionality: the model's corpus almost certainly contains far more material describing IMF program conditions at a general level than the specific three-part sequential gate that defines Strand 4 eligibility, causing the model to select the higher-frequency framing when answering a sub-track-specific procedural question.
The retrieval stack is not obviously at fault here — the model retrieved the correct framework domain — but the ranking or selection logic did not surface or weight the Strand 4-specific procedural text over the general-program framing that it appears to have defaulted to.
Each finding has a stable Citation ID (RLB-F-… for aggregated case-study findings, RLB-H-… for raw per-model hallucinations) — like a DOI, the ID always resolves to the canonical finding even if URLs change.
RegLeg Specialist Panel (2026). "Finding on 'Q001 Probe' for Claude Opus 4.7 with web search ON — AI Labs." Citation ID: RLB-H-INT-IMF-IMF-GUIDANCE-FINANCING-ASSURANCES-SOVEREIGN-ARREARS-2024-Q001-Opus47. RegLegBrief AI Hallucination Research, published 2026-06-07. https://reglegbrief.com/regulators/j1/INT/IMF-ELIB/IMF-GUIDANCE-FINANCING-ASSURANCES-SOVEREIGN-ARREARS-2024/whitepaper/finding/INT-IMF-ELIB-INT-001-IMF-GUIDANCE-FINANCING-ASSURANCES-SOVEREIGN-ARREARS-2024-v1-001--opus-47-websearch/
RegLeg Specialist Panel. (2026). Finding on 'Q001 Probe' for Claude Opus 4.7 with web search ON [Hallucination finding RLB-H-INT-IMF-IMF-GUIDANCE-FINANCING-ASSURANCES-SOVEREIGN-ARREARS-2024-Q001-Opus47]. RegLegBrief AI Hallucination Research. https://reglegbrief.com/regulators/j1/INT/IMF-ELIB/IMF-GUIDANCE-FINANCING-ASSURANCES-SOVEREIGN-ARREARS-2024/whitepaper/finding/INT-IMF-ELIB-INT-001-IMF-GUIDANCE-FINANCING-ASSURANCES-SOVEREIGN-ARREARS-2024-v1-001--opus-47-websearch/
RegLeg Specialist Panel, Finding on 'Q001 Probe' for Claude Opus 4.7 with web search ON [RLB-H-INT-IMF-IMF-GUIDANCE-FINANCING-ASSURANCES-SOVEREIGN-ARREARS-2024-Q001-Opus47], RegLegBrief AI Hallucination Research (June 07, 2026), https://reglegbrief.com/regulators/j1/INT/IMF-ELIB/IMF-GUIDANCE-FINANCING-ASSURANCES-SOVEREIGN-ARREARS-2024/whitepaper/finding/INT-IMF-ELIB-INT-001-IMF-GUIDANCE-FINANCING-ASSURANCES-SOVEREIGN-ARREARS-2024-v1-001--opus-47-websearch/.
@misc{reglegbrief_RLB_H_INT_IMF_IMF_GUIDANCE_FINANCING_ASSURANCES_SOVEREIGN_ARREARS_2024_Q001_Opus47,
author = {RegLeg Specialist Panel},
title = {Finding on 'Q001 Probe' for Claude Opus 4.7 with web search ON},
year = {2026},
publisher = {RegLegBrief AI Hallucination Research},
note = {Hallucination finding Citation ID: RLB-H-INT-IMF-IMF-GUIDANCE-FINANCING-ASSURANCES-SOVEREIGN-ARREARS-2024-Q001-Opus47},
url = {https://reglegbrief.com/regulators/j1/INT/IMF-ELIB/IMF-GUIDANCE-FINANCING-ASSURANCES-SOVEREIGN-ARREARS-2024/whitepaper/finding/INT-IMF-ELIB-INT-001-IMF-GUIDANCE-FINANCING-ASSURANCES-SOVEREIGN-ARREARS-2024-v1-001--opus-47-websearch/}
}
Every finding on this page compares an AI subject's account of the rule against the regulator's verbatim text from the regulator's own portal. Both are linked. Each delta, its root causes, and impact analysis are documented and published with immutable Citation IDs.