成唯識論演祕 2.96

2.96

Answer: Although the five are the subject, they are also called what is to be proved (sādhya). Hence, as the Yogācārabhūmi states: "How are there two kinds of what is to be proved? They are self-nature and distinction." The Nyāyamukha also states: "Only by virtue of the predicate is the predicate established; in this way is the subject established."