... UNGRAMHATICALITY AND EXTRA-GRAMMATICALITY IN NATURAL LANGUAGE UNDERSTANDING SYSTEMS Stan C. Kwasny as The Ohio State University Columbus, Ohio 1. Introduction Among the components included in Natural Language ... Pattern matching proceeds by matching each arc in the pattern against the input string, but is affected by the chosen "mode" of matching. Since the individual component arcs are, in a sense, ... ranging from uninflected plurals, possessives, and third person singulars to overinflection (use of inappropriate endings.) For co-occurrence violations, the blocks that keep inputs from being...