There is a well-known saying that the whole of Western Philosophy is footnotes of Plato. This is because his writings have set the schema that philosophy can be said to have followed ever since. Following under the teachings of Socrates, Plato's works are among the world's greatest literature. Cratylus is of opinion that a name is either a true name or not a name at all. He is unable to conceive of degrees of imitation; a word is either the perfect expression of a thing, or a mere inarticulate sound. Of the real Cratylus we know nothing, except that he is recorded by Aristotle to have been the friend or teacher of Plato.