John is rich, Katherine is tall, Derek is intelligent, This chili is spicy, we hear such expressions uttered all the time and they do not seem in the least problematic. On the contrary, it appears that we could not do without them. They are incredibly convenient: if instead of saying that Katherine is tall we had to specify exactly how tall she is and instead of saying that John is rich we had to provide a list of all his assets and belongings, we would not be able to communicate at all. On the one hand, we do not usually have all the relevant facts, and on the other – even if we had them – specifying all the details is time-consuming and ineffective. It is much easier to use rough-and-ready evaluations such as tall – short, rich – poor, etc. The common feature of all such assessments is their vagueness. Predicates like rich, tall, and intelligent are vague in a sense that their extensions seem not to have precise boundaries.