However, this assumption is not correct, since the speaker-hearer's linguistic intuition is not subject to nondistinctness in the sense of distinctive feature theory. For any transformation which is sufficiently diversified in application to be of any interest, the systematic use of complex symbols cannot be arbitrary in irrelevant intervening contexts in selectional rules. A consequence of the approach just outlined is that most of the methodological work in modern linguistics appears to correlate rather closely with a descriptive fact. This suggests that the appearance of parasitic gaps in domains relatively inaccessible to ordinary extraction is, apparently, determined by the extended c-command discussed in connection with (34). Clearly, the fundamental error of regarding functional notions as categorial is necessary to impose an interpretation on a corpus of utterance tokens upon which conformity has been defined by the paired utterance test.
see also: WikiPedia -- Chomskybot