 The ontology of natural language is instead displayed in other ways. One way in which it has been taken to manifest itself is in presuppositions of ontological categories carried by certain predicates: stop and happen require events, and move and exist (enduring) objects, on pain of resulting in a category mistake (but see Magidor 2013 for a critical discussion). A particularly important way in which the ontology of natural language manifests itself is restrictions of particular types of NPs to ontological categories of entities they may stand for. 'Perfect nominals' like John’s buying of the house can only stand for events, 'imperfect nominals' like John’s buying the house can only stand for facts (Vendler 1967). Bare adjective nominalizations like wisdom can only stand for qualities, and adjective nominalizations with a specifier (Socrates’ wisdom) for tropes; deverbal nominalizations like laughter are generally restricted to events  (§1.3).  Quantificational NPs like every time can range only over times or situations, quantifiers like somewhere only over places, and quantifiers like somehow only over qualities. Other ways in which the ontology of natural language manifests itself will be elaborated in  Section 2.2.  