 Non-objectivism (as it will be called here) allows that moral facts exist but holds that they are non-objective. The slogan version comes from Hamlet: “there is nothing either good or bad, but thinking makes it so.” For a quick example of a non-objective fact, consider the different properties that a particular diamond might have. It is true that the diamond is made of carbon, and also true that the diamond is worth $1000, say. But the status of these facts seems different. That the diamond is carbon seems an objective fact: it doesn’t depend on what we think of the matter. (We could all be under the impression that it is not carbon, and all be wrong.) That the diamond is worth $1000, by contrast, seems to depend on us. If we all thought that it was worth more (or less), then it would be worth more (or less).