 Sapaṇ’s Treasury of Epistemological  Reasoning[2]  is one of Tibet’s best known and most consequential philosophical achievements, roundly extolled as a work of genius and validation of Sapaṇ’s reputation as an emanation of Mañjuśrī, the bodhisattva of wisdom. It is an unrivaled touchstone for Tibetan approaches to concept formation, philosophy of language, cognition and perception. Still, the work has an ambiguous legacy. Like the Three Vows, it was mired in controversy from its debut—controversy around a number of its stridently combative positions, but especially, and without end, controversy around its meaning. What’s more, at least some of its advocates were false friends, appropriating the glow of Sapaṇ’s legacy while making only selective use of the work’s masterful exposition of Dharmakīrti and, especially, turning a blind eye to crucial particulars that might call into question their own cherished  doctrines.[3]  Recent scholarship has begun to reveal the work’s own goals and place it within its intellectual contexts, but the project is complex and ongoing. This section is, of necessity, only a sketch.