Buddhist logic-epistemology established by Dignāga developed through opposition and interaction with theories of other schools. Among the significant arguments of early Buddhist epistemology, attention should be paid to Uddyotakara of the Nyāya school. He directly criticizes Dignāga’s epistemological theory in various sections of his work Nyāyavārttika. Dignāga presents the theory of inference regarding the basis of valid reasoning and provides the theory of the nine constituents to verify the validity of inference based on it. Uddyotakara accepts Dignāga’s theory of the nine constituents and supplements it with his own position to propose the theory of the sixteen constituents. Superficially, this theory of sixteen constituents seems to accommodate Dignāga’s views. However, considering the internal relations of the arguments presented here, one can discern Uddyotakara’s intention to reveal the internal contradictions inherent in Dignāga’s logic. In this lecture, the presenter intends to gather scattered passages from various texts related to this topic and examine the theoretical tension between the two theories.