因明入正理論疏 2.130

2.130

問：「因於宗無，喻於二無，與名不成。何故宗於因、喻上無，因於二喻無，不名不成？」答：「成他名成，翻名不成。因本成宗，而非二喻，喻成宗因，非宗成二，本成事別，故翻名不成。異此不然，非名不成。」

Question: "When the reason is absent in the thesis, or the example is absent in both, they are given the name 'unestablished'. Why is it that when the thesis is absent in the reason and example, or the reason is absent in the two examples, they are not named 'unestablished'?" Answer: "Establishing another is called 'establishing' (sādhana), and its reversal is called 'unestablished' (asiddha). The reason originally establishes the thesis, not the two examples; the example establishes the thesis and the reason, not the thesis establishing the two. Because what is originally established differs, their reversals are named 'unestablished'. Other than this, it is not so, and they are not named 'unestablished'."