The Transplant Surgeon

The problem: five patients are dying, each needing a different organ; one healthy visitor could supply all five — say what each utilitarian tool does with the case, and what the case does to the theory.

Run act utilitarianism first. Five lives against one: the raw sum says take the visitor's organs — everybody counted for one, and five is more than one. The verdict is monstrous, which is the point of the case: it is the justice objection and the rights objection fused into one operating room. Now run the defenses in order. Defense one — the case is rigged: real hospitals cannot keep such killings secret; discovery would empty every waiting room in the country, and dread of doctors would cost more welfare than five transplants save. Priced honestly, the sums vote no. Defense two — revise common sense — is available but finds no takers here: a theorist willing to call the harvesting right has not corrected intuition, and the case is why that defense has limits. Defense three — move to rules: a practice of harvesting visitors flunks the rule audit instantly, so rule utilitarianism forbids the operation without strain — until the collapse problem asks why the rule binds on the one night secrecy would hold. Where does the case leave the theory? Wounded but instructive: utilitarianism explains, better than any rival so far, why the practice would be catastrophic — and struggles, at the level of the single hidden act, to say why this one operation would be wrong in the dark. The invented case has done a thought experiment's exact job: isolated the commitment, and made the theory show it.