Praeteritio

Apophasis (Greek ἀπόφασις from ἀπόφημι apophemi, "to say no") is a rhetorical device wherein the speaker or writer brings up a subject by either denying it, or denying that it should be brought up. Accordingly, it can be seen as a rhetorical relative of irony.

The device is also called paralipsis (παράλειψις) – also spelled paraleipsis or paralepsis – or occupatio, and known also as praeteritio, preterition, antiphrasis (ἀντίφρασις), or parasiopesis (παρασιώπησις).

As a rhetorical device, apophasis can serve a number of purposes.

It can be employed to raise an ad hominem or otherwise controversial attack while disclaiming responsibility for it, as in, "I refuse to discuss the rumor that my opponent is a drunk." This can make it a favored tactic in politics.

Apophasis can be used passive-aggressively, as in, "I forgive you for your jealousy, so I won't even mention what a betrayal it was."

In Cicero's "Pro Caelio" speech, he says to a prosecutor, "Obliviscor iam iniurias tuas, Clodia, depono memoriam doloris mei" ("I now forget your wrongs, Clodia, I set aside the memory of my pain [that you caused].")

Apophasis can be used to discuss a taboo subject, as in, "We are all fully loyal to the emperor, so we wouldn't dare to claim that his new clothes are a transparent hoax."

As a rhetorical device, it can serve various purposes, often dependent on the relationship of the speaker to the addressee and the extent of their shared knowledge. Apophasis is rarely literal; instead, it conveys meaning through implications that may depend on this context. As an example of how meaning shifts, the English phrase "needless to say" invokes shared understanding, but its actual meaning depends on whether that understanding was really shared. The speaker is alleging that it is not necessary to say something because the addressee already knows it, but is it so? If it is, it may merely emphasize a pertinent fact. If the knowledge is weighted with history, it may be an indirect way of levying an accusation ("needless to say, because you are responsible"). If the addressee does not actually already possess the knowledge, it may be a way to condescend: the speaker suspected as much but wanted to call attention to the addressee's ignorance. Conversely, it could be a sincere and polite way to share necessary information that the addressee may or may not know without implying that the addressee is ignorant.

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Wikipedia