Bioi also display a predictable set of “internal features” (setting, motifs, tone, quality of characterization, etc.). Those bioi that have survived are typically “fairly literary,” but there is evidence for more popular works, no longer extant. Although bioi focus on one person, the topics addressed vary within a range of typical options. The tone is generally serious. Bioi appear to be written with a wide range of often overlapping rhetorical purposes (entertainment, exemplification, apologetic,