According to Dunny's biography, is Magnus Eisengrim's life depicted as entirely honest?

In Dunny's biography, Magnus Eisengrim's life is portrayed as largely fictional. This reflects the theme of the book where characters' histories and identities are often complex and layered, blending truth with embellishment or outright fabrication. Magnus represents a larger idea of the self being constructed through narratives, and his life story is used to explore the notion of persona versus reality. The fictional elements in his life highlight the idea that individual identity is not solely based on objective truth but is influenced significantly by perception and imagination. This approach invites readers to consider how truth and fiction intermingle in the realm of personal biography and storytelling, which is central to the thematic structure of "Fifth Business."