I would presume your topic is finished by now, but just in case you still need help....
A good argument against Sartre would be the social forces of norm. Yes (assuming free will) an individual can choose to "marry" or "not marry," but that same individual cannot choose the definition of "marry" or "not marry." They are socially contrived. The individual has no power over language.
Ponder this: The fact that the English language has a subject/verb requirement (ie: I (sub) am (verb) our thought and language becomes very influenced by this. Other languages with their different structural language have different philosopical-linguistical restraints.
On Nietzche, you should read Jaque Derrida's essays on play. The one flaw (that I've found) in Nietzche's writing is that he eliminates Metaphysics entirely. Yet, because language is entirely arbitrary and relative, it implies a metaphyics of its own. But if you thought Nietzsche/Sartre were hard, Derrida is harder than Chinese algebra
|