The second class of texts in the Perfection of Wisdom section are the works by Nāgārjuna that are collectively referred to as the “Middle-Way Collection of Reasonings” (དབུ་མ་རིགས་པའི་ཚོགས་, dbu ma rigs pa’i tshogs, D.3851-3855). Together with Āryadeva, Nāgārjuna is often referred to as one of two “charioteers” who founded major traditions in Buddhist thought (ཤིང་རྟའི་སྲོལ་འབྱེད་གཉིས་, shing rta’i srol ’byed gnyis). Nāgārjuna’s works are not typically thought of as proper Perfection of Wisdom scriptures, yet Zhuchen classifies the “Middle-Way Collection of Reasonings” here perhaps in deference to their major import for Buddhist thought concerning ultimate truth. As Zhuchen notes in his catalog, the “Collection of Reasonings” texts do not physically appear in this section of the Tengyur, but are found below in the Madhyamaka section.