 We might expect a utilitarian to apply the utilitarian principle in her deliberations. Consider act utilitarianism. We might expect such a utilitarian to be motivated by pure disinterested benevolence and to deliberate by calculating expected utility. But it is a practical question how to reason or be motivated, and act utilitarianism implies that this practical question, like all practical questions, is correctly answered by what would maximize utility. Utilitarian calculation is time-consuming and often unreliable or subject to bias and distortion. For such reasons, we may better approximate the utilitarian standard if we don’t always try to approximate it. Mill says that to suppose that one must always consciously employ the utilitarian principle in making decisions