 This section of Tsongkhapa's work is based on the opening verse of Nāgārjuna's Root Verses on the Middle Way (Mūla-madhyamaka-kārikā). Tsongkhapa's Ocean of Reasoning (Garfield and Samten 2006) is a detailed exegesis of this work. In it, Nāgārjuna says nothing is produced because it is not produced from itself, other, both or neither. In Tsongkhapa's Great Exposition, the subject of Nāgārjuna's syllogism is primarily the embodied person, reflecting the trend that runs throughout Buddhist philosophical literature, in general, to stress the application of philosophical analysis to praxis. Furthermore, for Tsongkhapa, Nāgārjuna's statement is about a first moment in the continuum of the investigating person. By implication, reflecting the continuing influence of Śāntarakṣita, it is the person engaged in the philosophical investigation in the immediate moment. It is axiomatic for Buddhist philosophers that there is no independent subject (soul) other than the five heaps (skandhas), so the subject of the syllogism becomes the complex or continuum of sense-faculties in the present instant. Such a subject makes excellence sense of Tsongkhapa's otherwise confusing juxtaposition of Nāgārjuna's analysis with Dharmakīrti's epistemology, in which it is axiomatic that direct sense perception is an authoritative means of knowledge (Sk. pramāṇa).