To be fair, their meaningless is their value. Using "real world" names may distract from the logic being discussed or unreasonably suggest that the logic may fi

To be fair, their meaningless is their value. Using "real world" names may distract from the logic being discussed or unreasonably suggest that the logic may fit only a particular scenario. http://en.wikipedia.org/wiki/Metasyntactic_variable http://en.wikipedia.org/wiki/Metasyntactic_variable