“there are two types of codes, ciphers, and true codes. In the first, letters, or symbols that stand for letters, are shuffled and juggled according to a pattern. In the second, letters, words, or groups of words are replaced by other letters, symbols, or words. A code can be one type or the other, or a combination. But both have this in common: once you find the key, you just plug it in and out come logical sentences. A language, however, has its own internal logic, its own grammar, its own way of putting thoughts together with words that span various spectra of meaning. There is no key you can plug in to unlock the exact meaning. At best you can get a close approximation.”