Many decades ago, Oxford Philosophy of Language Professor J.L. Austin and Columbia philosopher Sidney Morgenbesser reportedly had this exchange:
“In English,” Professor Austin said, “a double negative forms a positive. However, in some languages, such as Russian, a double negative remains a negative. But there isn’t a single language, not one, in which a double positive can express a negative.”
A voice from the back of the room piped up, “Yeah, right.”
This absolutely makes my day.