"Writing as a system by itself has its own rules and structuring process. The abc lesson says that for letters to become words and for words to take on meanings, they must relate to other letters, to other words, to the context in which they evolve—be it verbal or nonverbal—as well as to other present and absent contexts. (Words are think-tanks loaded with second- and third-order memories that die hard despite their ever-changing meanings.) Thus, writing constantly refers to writing, and no writing can ever claim to be “free” of other writings."