  “The world is capable of being cut up in so many ways, and whenever we consider such a cut (some principle of individuation), we are considering the world cut that way, i.e., so articulated. An articulation will specify both actual conditions which must be met for something to be (an) F, and identity conditions for tracing Fs through space, time, and possible worlds. If there are portions of the world which meet the actual conditions, then there are Fs.” [Alan Sidelle, ‘Rigidity, Ontology, and Semantic Structure’ (1992: 172)]