因明入正理論疏 3.60

3.60

述曰：此標列異。異喻之法須無宗、因，離異簡濫，方成異品。既偏或雙於異上有，故有初三。要依簡法簡別離二，令宗決定，方名異品。既無簡法令義不明，故有第四。先宗後因可成簡別，先因後宗反立異義，非為簡濫，故有第五。翻同立異，同既五過，異不可增，故隨勝過亦唯五立。

The Commentary says: This states and enumerates the dissimilar. The property of a dissimilar example must lack both thesis and reason, setting aside differences and screening out overextension so that it only then becomes a dissimilar class (vipakṣa). Since either one or both are present in the dissimilar, the first three [fallacies] therefore arise. One must rely on the method of differentiation to differentiate and separate the two, causing the thesis to be determinate, before it is named a dissimilar class. Since there is no method of differentiation so that the meaning is unclear, the fourth [fallacy] arises. Thesis first and reason after can accomplish differentiation; reason first and thesis after conversely establishes a contrary meaning and does not screen out overextension, hence the fifth [fallacy] arises. Reversing the similar establishes the dissimilar; since the similar has five fallacies, the dissimilar cannot be increased, and thus in accordance with the predominant fallacies, only five are established.