成唯識論演祕 3.807

3.807

問：此論下云：又六識身若事、若類前後二念，腕既不俱有非互相熏。准此他許前後事、類更互相熏，不爾破他有相扶失。既不相扶，計何非五？

Question: Below, this Treatise says: 'Moreover, whether as individual substance or as class, the prior and subsequent two moments of the collection of the six consciousnesses are both non-coexistent and do not mutually perfume.' According to this, the other holds that the prior and subsequent individual substances and classes mutually perfume each other; if not, refuting the other would incur the fault of proving what is already accepted (siddhasādhana). Since it does not prove what is already accepted, why would their tenets not be five?