Dear Algebra, stop asking us to find your X, she's not coming back, and no we don't know Y.
A linguistics professor says during a lecture that, "In English, a double negative forms a positive. But in some languages, such as Russian, a double negative is still a negative. However, in no language in the world can a double positive form a negative." But then a voice from the back of the room piped up, "Yeah, right."
Heisenberg was speeding down the highway. A cop pulls him over and says "Do you have any idea how fast you were going back there?" Heisenberg says, "No, but I knew where I was."