AI Labs · updated 2026-05-31 · methodology v2.1

Finding on 'Q011 Probe' for Claude Opus 4.7 with web search ON

RLB Citation ID: RLB-H-INT-UNTC-BBNJ-HIGH-SEAS-BIODIVERSITY-AGREEMENT-2023-Q011-Opus47

What the RLB Specialist Panel found

Finding on 'Q011 Probe' for Claude Opus 4.7 with web search ON

Question (paraphrased to protect IP): What is the depositary notification reference number for the BBNJ Agreement's entry into force?
AI's response: "A C.N. number in the form 'C.N.[number].2025.TREATIES-XXI.10' surfaced in secondary sources — I cannot independently verify the exact serial number against the UN Treaty Collection from the searches I ran, so I would not state a specific C.N. serial with confidence."
Regulator's text: The depositary notification is C.N.447.2025.TREATIES-XXI.10, confirmed in the UN Treaty Collection record and corroborated by treaty-monitoring sources.
Why the AI went wrong: The model appropriately declined to commit to a specific serial number rather than fabricating one — this is a case where calibrated uncertainty was correct. The residual concern is that the model's web search returned only secondary aggregator sources rather than the UN Treaty Collection's own depositary notification record. A correctly routed retrieval step should have surfaced the primary UN record; instead the model relied on secondary sources and chose uncertainty over confabulation. That outcome was good, but the retrieval path was not.
Cited source(s):
https://bbnj-mgr.fas.harvard.edu/status-bbnj-treaty-entry-force — Pretextual
https://sdg.iisd.org/news/with-60-ratifications-bbnj-agreement-to-enter-into-... — Pretextual

Impact for this audience

This finding is a retrieval-routing signal rather than a content error. The model correctly expressed uncertainty rather than fabricating a reference number — a good outcome — but its web search returned only secondary aggregator sources rather than the UN Treaty Collection's primary depositary record. The retrieval ranker should de-weight aggregators for treaty-registry queries in favour of official UN portals.

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Cite this finding

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.

RLB Citation ID: RLB-H-INT-UNTC-BBNJ-HIGH-SEAS-BIODIVERSITY-AGREEMENT-2023-Q011-Opus47

Plain text Download

RegLeg Specialist Panel (2026). "Finding on 'Q011 Probe' for Claude Opus 4.7 with web search ON — AI Labs." Citation ID: RLB-H-INT-UNTC-BBNJ-HIGH-SEAS-BIODIVERSITY-AGREEMENT-2023-Q011-Opus47. RegLegBrief AI Hallucination Research, published 2026-05-31. https://reglegbrief.com/regulators/j1/int/untc/bbnj-high-seas-biodiversity-agreement-2023/whitepaper/finding/INT-UNTC-INT-001-BBNJ-HIGH-SEAS-BIODIVERSITY-AGREEMENT-2023-v1-011--opus-47-websearch/

APA 7th edition Download

RegLeg Specialist Panel. (2026). Finding on 'Q011 Probe' for Claude Opus 4.7 with web search ON [Hallucination finding RLB-H-INT-UNTC-BBNJ-HIGH-SEAS-BIODIVERSITY-AGREEMENT-2023-Q011-Opus47]. RegLegBrief AI Hallucination Research. https://reglegbrief.com/regulators/j1/int/untc/bbnj-high-seas-biodiversity-agreement-2023/whitepaper/finding/INT-UNTC-INT-001-BBNJ-HIGH-SEAS-BIODIVERSITY-AGREEMENT-2023-v1-011--opus-47-websearch/

Bluebook / OSCOLA (US + UK legal) Download

RegLeg Specialist Panel, Finding on 'Q011 Probe' for Claude Opus 4.7 with web search ON [RLB-H-INT-UNTC-BBNJ-HIGH-SEAS-BIODIVERSITY-AGREEMENT-2023-Q011-Opus47], RegLegBrief AI Hallucination Research (May 31, 2026), https://reglegbrief.com/regulators/j1/int/untc/bbnj-high-seas-biodiversity-agreement-2023/whitepaper/finding/INT-UNTC-INT-001-BBNJ-HIGH-SEAS-BIODIVERSITY-AGREEMENT-2023-v1-011--opus-47-websearch/.

BibTeX Download

@misc{reglegbrief_RLB_H_INT_UNTC_BBNJ_HIGH_SEAS_BIODIVERSITY_AGREEMENT_2023_Q011_Opus47,
  author    = {RegLeg Specialist Panel},
  title     = {Finding on 'Q011 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-UNTC-BBNJ-HIGH-SEAS-BIODIVERSITY-AGREEMENT-2023-Q011-Opus47},
  url       = {https://reglegbrief.com/regulators/j1/int/untc/bbnj-high-seas-biodiversity-agreement-2023/whitepaper/finding/INT-UNTC-INT-001-BBNJ-HIGH-SEAS-BIODIVERSITY-AGREEMENT-2023-v1-011--opus-47-websearch/}
}

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