Identity of Illocutionary Forces and Illocutionary Act

Identity of illocutionary forces is a relationship between two illocutionary forces such that when they are employed with the same propositional content, they have the same conditions for nondefective performance. The two forces thus serve the same purpose and have the same components of illocutionary force.
An illocutionary act is a complete speech act, made in a typical utterance, that consists of
the delivery of the propositional content of the utterance (including references and a predicate), and a particular illocutionary force, whereby the speaker

• asserts

• suggests

• demands

• promises, or vows.