This kind of case leads some consequentialists to introduce agent-relativity into their theory of value (Sen 1982, Broome 1991, Portmore 2001, 2003). To apply a consequentialist moral theory, we need to compare the world with the transplant to the world without the transplant. If this comparative evaluation must be agent-neutral, then, if an observer judges that the world with the transplant is better, the agent must make the same judgment, or else one of them is mistaken. However, if such evalu