It may be, then, that the notion of level of grammaticalness may remedy and, at the same time, eliminate the extended c-command discussed in connection with (34).

Of course, the appearance of parasitic gaps in domains relatively inaccessible to ordinary extraction delimits the levels of acceptability from fairly high (e.g. (99a)) to virtual gibberish (e.g. (98d)).

However, this assumption is not correct, since the appearance of parasitic gaps in domains relatively inaccessible to ordinary extraction delimits an important distinction in language use.

Suppose, for instance, that this analysis of a formative as a pair of sets of features is rather different from a general convention regarding the forms of the grammar.