This approach has encouraged the view that even true/false constative statements have illocutionary force (as in "I hereby state and affirm") and even performatives can be evaluable as true/false statements (as "guilty" verdict might be right or wrong). It is also often emphasised that Austin introduced the illocutionary act by means of a contrast with other aspects of "doing" by "speaking." The illocutionary act, he says, is an act performed in saying something, as contrasted with a locutionary act, the act of saying something, and also contrasted with a perlocutionary act, an act performed by saying something.