Does this sentence make any sense to you as a native speaker? The one who said this actually meant to say, "People like you can never be sure about anything" (implying the opposite side is very ignorant), but this usage of "ain't" has never appeared anywhere I have seen; does it make any sense to say so?
Learn English – “You ain’t able to be sure about anything.”
aintcontractionsgrammaticalitymeaningverbs
Best Answer
Ain't is a common, normal slang word in English. It does make perfect sense, but it sounds very uneducated.
I would suggest that "ain't" is a rather archaic slang word. It's something that a gangster in the 1930s would say.
In that particular sentence, this form: "You ain't sure about nuthin'" is more common.
Ain't also has a historical interest. The first ever "talking movie" (movie with sound) was The Jazz Singer starring Al Jolson. The film is indeed an ordinary silent film for 20 minutes, just like any other "normal" film of the day, and then—this was astounding to the audience of the day—Jolson says: "Wait a minute, wait a minute, you ain't heard nothin' yet."
So, "ain't" was the 8th word ever uttered in the movies!
In fact, my grandfather who was a very keen movie-goer, was at one of the first performances of this first "talkie," and indeed he literally dropped his cigarette and fell off his chair at the moment when Jolson "opened his mouth and words came out." It's a great family story.