Reality is frequently inaccurate. Douglas Adams, The Restaurant at the End of the Universe. Cogito Ergo Sum. Discours de la M thode. No philosophy that he had ever heard or read gave any reasonable purpose for man's existence, nor any rational clue to his proper conduct.
Parts of speech are metaphors because the whole of nature is a metaphor of the human mind.
The map is not the territory. We live in a world ruled by fictions of every kind - mass merchandising, advertising, politics conducted as a branch of advertising, the instant translation of science and technology into popular imagery, the increasing blurring and intermingling of identities within the realm of consumer goods, the preempting of any free or original imaginative response to experience by the television screen. We live inside an enormous novel. For the writer in particular it is less and less necessary for him to invent the fictional content of his novel. The fiction is already there.