The current conversation is a performative demonstration thereof.
British Dictionary definitions for performative
adjective (linguistics, philosophy)
denoting an utterance that constitutes some act, esp the act described by the verb. For example, I confess that I was there is itself a confession, and so is performative in the narrower sense, while I'd like you to meet … (effecting an introduction) is performative only in the looser sense See also locutionary act, illocution, perlocution
(as noun): that sentence is a performative
denoting a verb that may be used as the main verb in such an utterance