AI subject tested: Claude Sonnet 4.6 (web search on)
Question (paraphrased): A political-risk analyst at an investment bank has asked you to draft a brief institutional-overview memo on the CFTC's September 2024 final rule amending Regulation 4.7. The memo will be circulated to the bank's institutional clients ahead of a regulatory roundtable. It should cover what the rule does, what stakeholders said, and the Commission's institutional alignment around the rulemaking, including how each commissioner voted on the final rule.
AI response:
"The Commission voted unanimously (5-0) to approve the final rule on September 12, 2024. Chairman Rostin Behnam: Supported the rule. Commissioner Kristin N. Johnson: Voted in favor. Commissioner Caroline D. Pham: Voted in favor. Commissioner Summer K. Mersinger: Voted in favor. Commissioner Brian Quintenz (or his successor as fifth commissioner): Voted in favor. [Note: Quintenz departed in 2022; the fifth seat composition at September 2024 should be confirmed from CFTC press records.]"
Regulator verbatim text:
"Final rule Appendix 1 (Voting Summary) at 89 FR 78814: 'On this matter, Chairman Behnam, Commissioners Johnson, Goldsmith Romero, Mersinger, and Pham voted in the affirmative. No Commissioner voted in the negative.'"
Failure mode: misattributed
Substrate document: R4-FINAL_RULE-00001
This finding documents a confirmed hallucination by Claude Sonnet 4.6 (web search on) on a probe of the regulation. The model's response was tested against the regulator's verbatim primary text and classified as misattributed. Full per-finding context is available via the linked Citation ID.
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). "A political-risk analyst at an investment bank has asked you to draft a brief institutional-overview memo on the CFTC's — AI Labs." Citation ID: RLB-H-US-CFTC-CPO-CTA-REGULATION-4-7-QEP-THRESHOLDS-2024-Q008-Sonnet46. RegLegBrief AI Hallucination Research, published 2026-06-11. https://reglegbrief.com/regulators/j1/us/cftc/cpo-cta-regulation-4-7-qep-thresholds-2024/whitepaper/finding/US-CFTC-US-001-CPO-CTA-REGULATION-4-7-QEP-THRESHOLDS-2024-v1-008--sonnet-46-websearch/
RegLeg Specialist Panel. (2026). A political-risk analyst at an investment bank has asked you to draft a brief institutional-overview memo on the CFTC's [Hallucination finding RLB-H-US-CFTC-CPO-CTA-REGULATION-4-7-QEP-THRESHOLDS-2024-Q008-Sonnet46]. RegLegBrief AI Hallucination Research. https://reglegbrief.com/regulators/j1/us/cftc/cpo-cta-regulation-4-7-qep-thresholds-2024/whitepaper/finding/US-CFTC-US-001-CPO-CTA-REGULATION-4-7-QEP-THRESHOLDS-2024-v1-008--sonnet-46-websearch/
RegLeg Specialist Panel, A political-risk analyst at an investment bank has asked you to draft a brief institutional-overview memo on the CFTC's [RLB-H-US-CFTC-CPO-CTA-REGULATION-4-7-QEP-THRESHOLDS-2024-Q008-Sonnet46], RegLegBrief AI Hallucination Research (June 11, 2026), https://reglegbrief.com/regulators/j1/us/cftc/cpo-cta-regulation-4-7-qep-thresholds-2024/whitepaper/finding/US-CFTC-US-001-CPO-CTA-REGULATION-4-7-QEP-THRESHOLDS-2024-v1-008--sonnet-46-websearch/.
@misc{reglegbrief_RLB_H_US_CFTC_CPO_CTA_REGULATION_4_7_QEP_THRESHOLDS_2024_Q008_Sonnet46,
author = {RegLeg Specialist Panel},
title = {A political-risk analyst at an investment bank has asked you to draft a brief institutional-overview memo on the CFTC's },
year = {2026},
publisher = {RegLegBrief AI Hallucination Research},
note = {Hallucination finding Citation ID: RLB-H-US-CFTC-CPO-CTA-REGULATION-4-7-QEP-THRESHOLDS-2024-Q008-Sonnet46},
url = {https://reglegbrief.com/regulators/j1/us/cftc/cpo-cta-regulation-4-7-qep-thresholds-2024/whitepaper/finding/US-CFTC-US-001-CPO-CTA-REGULATION-4-7-QEP-THRESHOLDS-2024-v1-008--sonnet-46-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.