道教重玄學與佛教中觀學間的對比與交談：以成玄英與吉藏之方法論為例=Contrast and Communication between Daoist Chongxuanxue and Buddhist Madhyamaka: Cheng Xuanying and Jizang's Methodologies as a Case Study
Chongxuanxue, The Study of Twofold Mystery, is a philosophical current within religious Daoism which ingeniously integrates the reasoning methodologies of the Daoist and Buddhist traditions, or more specifically for the latter, Buddhist Madhyamika catuṣkoṭi(ka). Inspired by the philosophy of contrast devised by Vincent Shen, this paper aims at investigating how Cheng Xuanying, the most representative Chongxuan thinker, communicates with Jizang, a Chinese Buddhist scholar who further developed catuṣkoṭi(ka), on the subject of reasoning methodology. In this paper, I first determine the way in which Jizang appropriated and developed Nāgārjuna's catuṣkoṭi(ka). Second, I trace the influence in Cheng Xuanying's work by comparing his Chongxuan methodology with the methodology of negation found in the Zhuangzi and its Xiang-Guo commentary. Finally, having established the positions of Jizang and Cheng Xuanying within their own respective traditions, I put into contrast their reasoning methodologies, with a particular emphasis on how Cheng responds to Jizang's critique of Daoism.
