/ˈdəbl ˈnɛɡətɪv/ – Phrase
Definition: Sự sử dụng hai phủ định trong một câu, dẫn đến ý nghĩa khẳng định.
A more thorough explanation: 1. a sentence where two negative words are used to make a positive. The effect is to make the sentence more complicated than necessary, and more difficult to understand.
2. a sentence where two negative words are used when only one would be correct
Example: 1. He has earned a not inconsiderable amount over the past year (=he has earned a lot of money).
2. I ain’t got nothing to say. NB What the speaker wanted to say was “I have nothing to say”. However, on a strict understanding of the grammar, the speaker has actually said “I have something to say.”