During the Middle Ages, the relationship between the Buddha's omniscience and his religious authority was a major issue in Buddhist thought. One of the most extensive and sophisticated discussions on this topic is found in the Pramanavarttikalankarabhasya, the magnum opus of the 8th-century Buddhist master Prajnakaragupta. In this study, author Shinya Moriyama combines philological acumen with philosophical analysis to present Prajnakaragupta's innovative ideas, offering an important introduction to his religious thought in its historical context of post-Dharmakirtian Buddhist epistemology....