I asked an AI who I am. It gave me four answers. Four different lives. Four confident, detailed biographies of complete strangers. It lied every time. The first described a television journalist. The second detailed an accountant in parliament. The third outlined a former police officer. The fourth grazed a sliver of my reality. Four requests. Four authoritative, fully formed fictions. Not one of them was me.   What does it mean when a machine erases you and inserts a ghost?