An alternative origin narrative stresses the development of speech-act theory by philosophers J. L. Austin and Judith Butler, literary critic Eve Kosofsky Sedgwick, and also Shoshana Felman. The theory proposed by Austin in "How To Do Things With Words" states that "to say something "is to do something", or "in" saying something we do something, and even "by" saying something we do something". the most illustrative example being "I do", as part of a marriage ceremony. For any of these performative utterances to be felicitous, per Austin, they must be true, appropriate and conventional according to those with the proper authority: a priest, a judge, or the scholar, for instance. Austin accounts for the infelicitous by noting that "there will always occur difficult or marginal cases where nothing in the previous history of a conventional procedure will decide conclusively whether such a procedure is or is not correctly applied to such a case". The possibility of failure in performatives (utterances made with language and the body) is taken up by Butler and is understood as the "political promise of the performative". Her argument is that because the performative needs to maintain conventional power, convention itself has to be reiterated, and in this reiteration it can be expropriated by the unauthorized usage and thus create new futures. She cites Rosa Parks as an example: