[RealSNR]

A professor of linguistics was teaching an introductory course in his field, and felt that the students were indifferent and cold to what it was they were learning. He wanted to excite them about linguistics. So towards the end of a lecture one day, he made this passionate and intriguing point:

"In the English language, a double negative equals a statement in the affirmative. There are some languages such as Russian, where a double negative equals a statement in the negative. However, is it not fascinating that in ALL of the world's thousands of known languages, there does not exist a single case of a language where a double positive can equal a negative?"

This prompted one of the students to roll his eyes and say, "Pfft. Yeah, right."