Really funny jokes-Double positive

Professor Kachwala, a linguistics teacher at Narsee Monjee was in the middle of his lecture.

He said, "In English, a double negative forms a positive. However, there are some languages like Russian, in which a double negative remains a negative. But there is not a single language in the world, in which a double positive can convey a negative."

Asad, a student, sitting in the last bench retorted, "Yeah, right."