My brother told me this. Feels like it belongs here. A grammar teacher was lecturing his students on double negatives. He explains, ""In some languages, take English, for example, if you were to use double negatives, it is the equivalent of a positive. It isn't considered proper grammar for that reason."" A student raises his hand. ""Like in Algebra?"" ""Exactly. However, in other languages, like Russian, a double negative is still a negative. For those of you who are curious, there is no language where a double positive equals a negative."" A student piped up in the back. ""Yeah, right.""