Moody’s Reviews > Arrival > Status Update

But language wasn’t only for communication: it was also a form of action. According to speech act theory, statements like “You’re under arrest,” “I christen this vessel,” or “I promise” were all performative: a speaker could perform the action only by uttering the words. For such acts, knowing what would be said didn’t change anything. (…) With performative language, saying equaled doing.