A unit of verbal behaviour that depends on other verbal behaviour for its occurrence and that modifies the effects of that other verbal behaviour on the listener. Descriptive autoclitics involve discriminations of one's own behavior, as when the word not depends on a mismatch between what one is inclined to say and the appropriateness of saying it; including not in the statement cancels some of its effects on the listener. Relational autoclitics involve verbal units that are coordinated with other units in such a way that they cannot stand alone, as when plurals depend on quantitative features of events or grammatical tenses depend on temporal features; novel verbal behaviour is sometimes the product of novel combinations of such units occasioned by novel circumstances.