K. argues that implicative verbs, like factives, involve presuppositions, though in a different way: an implicative verb such as 'manage' carries a presupposition that it represents a necessary and sufficient condition for the truth of its complement sentence. The speaker's being committed to the truth of the complement sentence or not, depends on the main sentence (i.e. on the presence of negation, modals, and on the illocutionary force).