The phrase “well-known industry standard” is not evidence. Without the name of the standard, its issuing body, version, publication date, or an authoritative citation, the statement cannot be independently verified. Option D correctly treats the assertion as unsupported and requires either authoritative substantiation or removal.

Claude can produce fluent, confident language that appears credible even when the underlying claim is incomplete, inaccurate, or fabricated. Adding stronger language, as proposed in Option A, would amplify the unsupported claim rather than correct it. Options B and C confuse plausibility and confidence with verification. A claim does not become reliable merely because it sounds familiar or uses reassuring terminology.

The reviewer should identify the purported standard, locate the original issuing organization or official publication, confirm that the standard applies to the subject and jurisdiction, and cite the relevant section. If those checks cannot be completed, the claim should be deleted or rewritten to disclose uncertainty. Anthropic recommends grounding factual statements in direct source material, using citations to make claims auditable, and retracting claims for which supporting evidence cannot be found. This approach directly addresses hallucination risk while preserving the brief’s credibility. Anthropic’s hallucination-reduction guidance

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