 One version of the “active perception” model was upheld by Ngok Loden Shérap, who included in his understanding of reliable cognition the requirement of a conceptual determination, while upholding the classical tenet that perception itself cannot conceptually determine its object. The model of reliable perception he proposes is thus indirectly active. It follows the two-tier way of accounting for determination in the “passive perception” model, but sets determination as a necessary condition for reliability.