Valhalla Underground?: if I Am I and You Are You then Who is X

I'd like you to meet my friend Xavier Basch. He hates cops, authority, government; you know, anything that restrains him. Xavier seeks the kind of unattainable freedom that only an anarchical nihilist could dream. The irony is, that his relentless search to realize his own destiny lands him in prison. Now granted, killing a cop would seem to be the most counter-productive attempt to liberate one's self, but Xavier can be a little irrational at times. You see, Xavier's heart is laden with heaviness of his dark past. He represses these memories to such a strong degree, that he passes out frequently. It's like he can control his own amnesia! Inside his lucid dreams, he finds familiar sights and sounds. A dream world too subtle and boring to be fantasy. In fact, Xavier's dreams are so lifelike that he sometimes confuses the waking world with the dream world. Which poses very intriguing questions. Is his life in prison reality, or are his boring dreams? Is Xavier a heavily confused mental case, or is he the only one who knows the truth? Perhaps the most frightening question is: Is Xavier really Xavier? If I am I And you are you Then, who is X?