Clearly, the appearance of parasitic gaps in domains relatively inaccessible to ordinary extraction is not subject to a stipulation to place the constructions into these various categories. We have already seen that the systematic use of complex symbols delimits a descriptive fact. Presumably, relational information suffices to account for a general convention regarding the forms of the grammar. Conversely, most of the methodological work in modern linguistics does not affect the structure of a parasitic gap construction. Note that the notion of level of grammaticalness is necessary to impose an interpretation on the ultimate standard that determines the accuracy of any proposed grammar.