Note that the descriptive power of the base component can be defined in such a way as to impose the strong generative capacity of the theory. We have already seen that the speaker-hearer's linguistic intuition is not quite equivalent to nondistinctness in the sense of distinctive feature theory. Conversely, the earlier discussion of deviance is rather different from a parasitic gap construction. Suppose, for instance, that most of the methodological work in modern linguistics does not readily tolerate the traditional practice of grammarians. Notice, incidentally, that this selectionally introduced contextual feature may remedy and, at the same time, eliminate problems of phonemic and morphological analysis.
see also: WikiPedia -- Chomskybot