 Properties are those entities that can be predicated of things or, in other words, attributed to them. Thus, properties are often called predicables. Other terms for them are “attributes”, “qualities”, “features”, “characteristics”, “types”. Properties are also ways things are, entities that things exemplify or instantiate. For example, if we say that this is a leaf and is green, we are attributing the properties leaf and green to it, and, if the predication is veridical, the thing in question exemplifies these properties. Hence, properties can also be characterized as exemplifiables, with the controversial exception of those that cannot be instantiated, e.g., some would say, round and square. It is typically assumed that no other entities can be predicated and exemplified (Aristotle, Categories, 2a). For example, ordinary objects like apples and chairs cannot be predicated of, and are not exemplified by, anything.