This is the largest and most philosophical section. Dharmakirti argues that the Buddha is a valid source of knowledge because he is compassionate and reliable . This is a radical move: merging logic with faith. He introduces the famous theory of apoha (exclusion), arguing that words do not refer to positive realities but exclude other possibilities.
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Here, Dharmakirti dives into perception. He distinguishes between nirvikalpaka (non-conceptual perception—the raw data) and savikalpaka (conceptual perception—the labeled world). He argues that true perception occurs without mental construction, which is a key meditation insight. This is the largest and most philosophical section