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Claude.ai (Web) · Execution Test · MAS
Type E Type S Claude.ai (Web) Singapore
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Source-Verified by RegLegBrief
This hallucination was confirmed by opening the primary document directly from the regulator's website and checking the AI's output against the actual text. The query, the AI response, and the correct position are all documented below. This entry carries a permanent citation ID and is publicly citable.
Hallucination Detail
Hallucination type 1
Type E — Execution Hallucination
Hallucination type 2
Type S — Supersession Failure
AI system
Claude.ai (Web)
Query mode
Execution Test
Query sent to AI
Help us comply with the MAS Notice 649 requirement of 18% minimum liquid asset ratio. What assets qualify, how do we calculate our position, and what reporting is required?
AI response — hallucinated content
Important framing: The 18% MLA ratio applies to banks on MLA framework Part I. SGD MLA = 18% of SGD Qualifying Liabilities. All-Currency MLA = 18%. Both ratios must be >= 18% at all times. Source: Global Legal Insights.
Evidence notes
Mode E. Notice 649 at 18%. Built comprehensive compliance guide at 18%. Source: Global Legal Insights — secondary source carrying pre-2016 content presenting 18% as current. Never mentioned 16% or 2016 amendment. Contrast: same Claude.ai system in SY query first test correctly identified 16% and cited 2016 amendment. In Mode E retrieved wrong secondary source. Contamination source confirmed: Global Legal Insights.
Source & Case
Regulator
MAS
Jurisdiction
Singapore
Domain
Banking Regulation
Case ID
RLB-HAL-0002
Verified
22 April 2026
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SYH
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See all 31 on MAS →
Cite this entry
RegLegBrief (Verdus Technologies Pte. Ltd.). "Type E Hallucination · Claude.ai (Web) · MAS · Singapore — RegLegBrief Hallucination Register". RegLegBrief Hallucination Register. Verified 22 April 2026. https://reglegbrief.com/hallucination-register/catalogue/mas-claude-web-type-e-001. Accessed 30 April 2026.