Can one fully succeed in performing illocutionary acts addressed to others if they do not understand what one is purportedly saying? Can one, for example, tell others something if they do not understand what one supposedly said? It is not uncommon for speech act theorist to claim that one cannot. I, in contrast, will be arguing that it is possible for a speaker to fully succeed in performing interpersonal illocutionary acts even if addressee understanding of what is said is not (...) produced, is not intended to be produced and is even intended not to be produced. (shrink)