On our assumptions, the appearance of parasitic gaps in domains relatively inaccessible to ordinary extraction is unspecified with respect to a stipulation to place the constructions into these various categories. We have already seen that the natural general principle that will subsume this case is to be regarded as irrelevant intervening contexts in selectional rules. From C1, it follows that the speaker-hearer's linguistic intuition is not subject to nondistinctness in the sense of distinctive feature theory. We will bring evidence in favor of the following thesis: the theory of syntactic features developed earlier can be defined in such a way as to impose the traditional practice of grammarians. To provide a constituent structure for T(Z,K), the systematic use of complex symbols is rather different from an important distinction in language use.
see also: WikiPedia -- Chomskybot