The present work is a translation of The Perception Chapter of Jewel of Reflection on the Truth, a foundational text by the great fourteenth-century Indian logician Gangesa Upadhyaya. The authors' introduction and running commentary to the translation provide essential theoretical and historical background, contextualization, analysis, and comparison of Nyaya and Western traditions. Includes a detailed glossary and index. Published by American Institute of Buddhist Studies (AIBS)