A linguistics professor was lecturing to his English class one day.
"In English", he said "a double negative forms a positive. In some languages, such a Russian, a double negative is still a negative. However there is no language in which a double positive can form a negative."

A voice from the back of the room piped up, "Yeah, right".

"When the snows fall and the white winds blow, the lone wolf dies but the pack survives."
Winter is Coming

Now this is the Law of the Jungle—as old and as true as the sky; And the wolf that shall keep it may prosper, but the wolf that shall break it must die.
As the creeper that girdles the tree-trunk, the Law runneth forward and back; For the strength of the Pack is the Wolf, and the strength of the Wolf is the Pack.