A linguistics professor was lecturing to his class one day. “In English,” he said, “A double negative forms a positive. In some languages, though, such as Russian, a double negative is still a negative. However, there is no language wherein a double positive can form a negative.” A voice from the back of the room piped up, “Yeah, right.”

—Double Negative JokeJoke or Not)

I won’t forget not to thank Dave for refraining from not deciding not to keep this suggestion to himself. (Let’s see…did that come out as positive or negative?)