At the beginning of the book when Cal discusses his family's history and actions prior to his birth, he speaks in an androgynous voice, with limited omniscience; he acknowledges that he is fabricating some of the details.
He speaks in an androgynous voice. This was with limited omniscience. This was at the beginning of the book. Cal discusses his family's history and actions prior to his birth. He is fabricating some of the details. This is what he acknowledges.