Irony punctuation
Irony punctuation is any form of notation proposed or used to denote irony or sarcasm in written text. Written text, in English and other languages, lacks a standard way to mark irony, and several forms of punctuation have been proposed to fill the gap. The oldest is the percontation point in the form of a reversed question mark (), proposed by English printer Henry Denham in the 1580s for marking rhetorical questions, which can be a form of irony. Specific irony marks have also been proposed, such as in the form of an open upward arrow (△|), used by Marcellin Jobard in the 19th century, and in a form resembling a reversed question mark (), proposed by French poet Alcanter de Brahm during the 19th century.
Irony punctuation is primarily used to indicate that a sentence should be understood at a second level. A bracketed exclamation point or question mark as well as scare quotes are also occasionally used to express irony or sarcasm. Provided by Wikipedia