One of the most important skills the mature, educated, seasoned practitioner of a language can have is the ability to recognize and understand the invocation of
Tone.
Tone is a subcategory of
Wit.
It often involves saying things that one doesn't mean.
Really! Because the real meaning is
implied, not explicitly iterated, and
various cues invariably exist in a witty sentence to indicate to the sensitive, perspicacious, seasoned reader/listener that a "
trope" is being invoked.
A "
trope" is an example of
Wit.
Sarcasm and
Irony are just two types of
Trope, for there are many. Like notes in a perfume.
Anacothulon,
litotes,
bathos,
hyperbole are four more rhetorical tropes.
Do investigate this excellent webpage! They make for sparkling conversation, and prevent communiques from becoming leaden... too literal... too "black and white". Once we have learned to crawl, we then learn to walk; once we have learned to walk, we then long to dance. Wit is "dancing with words". To take everything one hears or reads
literally is (don't tell anyone) actually the mark of the dullard. (Or the stroke victim.)
Wit is so important and useful when people come together, as in this Forum, because its skillful invocation, and reception, prevents people from coming to loggerheads. Because it invokes what the French call the
"droit de fou" (the privelege of the court jester to say pointed-- even heated-- things without having his head cut off.)
The most civilized, literate, educated people "agree to disagree", and Wit is the way they do it.

Wit is actually a gift, for it is a way of making an ordinary statement more delightful... sometimes even more palatable. If YOU invoke Wit with ME, for example, it is paying me a compliment; you are implying that MY time is valuable, and you are going to get your point across in a succinct, charming and entertaining way! Do you see?
Prick up your ears to notice Wit whenever it occurs... and remember: What's literally said is NOT the exact meaning of the communique'.
Countries who have most valued unfettered Freedom Of Speech-- Britain, France, the USA--- most often have the most scintillating traditions of Wit. Coincidence?