Student or Learner
Double negative - Wikipedia, the free encyclopedia
"The world is supposed to end? Nah, I doubt it," one person said. "We ain't worried. Nah, the Bible don't say nothing about what time or what date. Whoever came up with that, I have no idea."
Is "don't say nothing" double negative?
Yes, it is. The problem with the double negative is that in standard English two negatives make a positive. Like multiplying two negative numbers yields a positive number.
But the double negative is often used to intensify the negative. This is sometimes a deliberate choice, other times it is simply a person's natural English.
In this case, the author means that the Bible does not contain a "time and date" for the end of the world. He used the double negative in a non-standard way.
This is not uncommon.
While I leave the usage of double negative to teachers to answer, I just want to say my experience with double negative used by native speakers.
Sometimes ago, I thought using double negative is a style of writing. I see a lot native speakers using it. Then I realized that, it is not style but error which even native speakers would commit. You can see it more common in movies. See this thread.
We can say they are "errors" or are "non-standard," but it is not like users of the double negative are usually misunderstood.
It is part of the evolution of language. I wouldn't use it in formal or business writing, but in casual conversation it is not uncommon for many native speakers.