trope in recent philosophical usage, an ‘abstract particular’; an instance of a property occurring at a particular place and time, such as the color of the cover of this book or this page. The whiteness of this page and the whiteness of the previous page are two distinct tropes, identical neither with the universal whiteness that is instantiated in both pages, nor with the page itself; although the whiteness of this page cannot exist independently of this page, this page could be dyed some other color. A number of writers, perhaps beginning with D. C. Williams, have argued that tropes must be included in our ontology if we are to achieve an adequate metaphysics. More generally, a trope is a figure of speech, or the use of an expression in a figurative or nonliteral sense. Metaphor and irony, e.g., fall under the category of tropes. If you are helping someone move a glass table but drop your end, and your companion says, ‘Well, you’ve certainly been a big help,’ her utterance is probably ironical, with the intended meaning that you have been no help. One important question is whether, in order to account for the ironical use of this sentence, we must suppose that it has an ironical meaning in addition to its literal meaning. Quite generally, does a sentence usable to express two different metaphors have, in addition to its literal meaning, two metaphorical meanings – and another if it can be hyperbolic, and so forth? Many philosophers and other theorists from Aristotle on have answered yes, and postulated such figurative meanings in addition to literal sentence meaning. Recently, philosophers loath to multiply sentence meanings have denied that sentences have any non-literal meanings; their burden is to explain how, e.g., a sentence can be used ironically if it does not have an ironical sense or meaning. Such philosophers disagree on whether tropes are to be explained semantically or pragmatically. A semantic account might hypothesize that tropes are generated by violations of semantical rules. An important pragmatic approach is Grice’s suggestion that tropes can be subsumed under the more general phenomenon of conversational implicature. See also IMPLICATURE, METAPHOR, META- PHYSICS , SKEPTIC. R.B.