11078. PHILOSOPHICAL ROOTS OF EXISTENTIALISM: SARTRE'S NAUSEA AND NIETZSCHE ON RATIONALITY. Present's Nietzsche's critique of language and rationality. Roquentin is discussed as an illustration of the puzzles Nietzsche poses: the impossibility of rationality to provide self-justification, the hostile meaninglessness of nature, and the relationship between ego and society. KEYWORDS: nietzsche sartre roquentin nausea zarasuthra existentialism rationality meaning of life. 24 pages, 39 footnotes, 3 bibliographic sources. 5,528 words.