 Ontologists often divide entities into two fundamental classes, those that are abstract and those that are concrete. Unfortunately, there is no consensus on just how this distinction is to be drawn. Most philosophers would classify the sorts of entities just mentioned (properties, states of affairs, and facts) as abstract. So understood, the claim that intrinsic value is borne by such entities is to be distinguished from the claim that it is borne by certain other closely related entities that are often classified as concrete. For example, it has recently been suggested that it is tropes that have intrinsic  value.[7]  Tropes are supposed to be a sort of particularized property, a kind of property-instance (rather than simply a property). (Thus the particular whiteness of a particular piece of paper is to be distinguished, on this view, from the property of whiteness.) It has also been suggested that it is states, understood as a kind of instance of states of affairs, that have intrinsic value (cf. Zimmerman 2001, ch. 3).