 This entry will merely scratch the surface of this rich tradition, which is by no means monolithic. Individual entries will hopefully be devoted to the respective thinkers in the future. Although Tibetan epistemologists address common themes of inquiry and can in part be situated within lineages sharing tendencies of interpretation, the individual compositions reveal a diversity that would make any attempt at grouping them into rigid categories prone to oversimplification. This article thus relies on the contributions of selected influential figures to sketch out some key topics of inquiry and conflicting models representative of mainstream interpretative orientations.