When a 'Different' Brand Delayed an Emergency Operation
A real-world example of Masked man fallacy in action
Context
A mid-sized regional hospital uses a mix of branded and rebranded surgical instruments supplied through several vendors. Procurement and regulatory teams track devices by a master Unique Device Identifier (UDI), while operating-room staff often refer to items by familiar brand names.
Situation
During an otherwise routine emergency appendectomy, the lead surgeon asked the nurse for a specific approved laparoscopic clamp described in the procedure notes by its brand name, 'SafeClamp.' The circulating nurse located a visually identical clamp on the cart, labeled with the distributor's brand 'MedGrip.' Because the surgeon did not 'know' that the MedGrip label referred to the same UDI-approved product, they refused to use it and insisted on opening another sealed pack.
The bias in action
The surgeon treated two co-referential objects (the clamp labeled 'SafeClamp' in the medical record and the identical device labeled 'MedGrip' on the cart) as if they were different, because they lacked knowledge that both labels referred to the same UDI-registered product. In this intensional context of 'knowing,' the substitution of names failed — the surgeon's belief about 'SafeClamp' did not transfer to 'MedGrip' even though both refer to the same physical device. The operating team escalated to procurement for verification rather than using the known-approved device, reflecting the masked man fallacy: confusing lack of name-based knowledge with non-identity.
Outcome
The verification process took 150 minutes from the time the surgeon first queried the instrument's identity. The surgery proceeded once procurement confirmed the UDI match, but the delay contributed to a more complicated intraoperative course and a longer hospitalization for the patient. Hospital managers later calculated added costs attributable to the delay and revised supply-room labeling and verification protocols.
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