成唯識論演祕 2.62

2.62

雖無明文，以理言之亦得有假，如和合香可許是假。故《瑜伽論》五十四云：空行風中無俱生香，唯假合者，既云假合，明知是假，味中必有和合之味類香，通假。

Although there is no explicit text, speaking according to reason, there can also be conventional [forms], as composite incense may be allowed to be conventional. Therefore, the Yogācārabhūmi, fascicle 54, says: "In the wind moving through the sky, there is no co-arising smell, only that which is conventionally combined." Since it says "conventionally combined," it clearly knows it is conventional; among tastes, there must also be composite tastes, which are analogous to smell and share in conventionality.