The philosophical system of 'Nyaya', which establishes a rigorous framework of logical epistemology and methodology, was originally propounded by the sage:

💡 Solution & Explanation

Sage Gautama is credited with propounding the Nyaya philosophy, one of the six orthodox schools of Vedic philosophy that emphasizes logical reasoning and epistemological validity. Other sages like Kapila founded the Samkhya system, while Patanjali codified Yoga.