Abstract

The modern form of realism about properties has typically been far more austere than its Platonic ancestor. There is nothing especially austere about denying, as most modern property realists do, the reality of “disjunctive properties”—properties which would correspond, in the world, to disjunctive predicates such as “is an apple or an ocean,” “is observed by now and green or not observed by now and blue,” etc. But modern property realists typically deny far more. It has been argued, for example, that the only real properties there are are properties flanked by contrary opposites—so that there is no real property corresponding, for example, to the predicate “is self-identical.” Perhaps the biggest step in the direction of austerity is the argument, offered by a number of modern property realists, that there can be in the world no “determinable properties” corresponding to such determinable predicates as “has mass,” “is colored,” or “has a valence.” For these arguments are said to establish that not even such familiar properties as redness or painfulness really exist; to predicates such as “is red” and “is painful,” no real property corresponds. The business of this paper is to examine the prevailing arguments against “determinable properties,” and to argue that the ontology which they entail is decidedly less austere than is commonly supposed. The motivation is mainly just to get a more accurate ontology of properties. But a side benefit, if my arguments are correct, will be an increased appreciation for the treatment of vague predicates that posits truth-value gaps—and with it, increased ease with the idea that corresponding to vague predicates there really are, in the world, vague properties.