俱舍論記 19.189

19.189

「以記彼問言此不應記故」者，答。以記彼一、異等問言，此不應記故。准此即是發言記問，非是默然不記名捨置記。古來諸德皆言第四名為默答，此釋不然。又《婆沙》十五云「如諸外道問世尊言：世界常耶？佛言：此不應答。以此准知，發言名答。」

[On the phrase] “Because one declares regarding that question, saying: 'This should not be declared'”: This is the answer. Because one declares regarding the question of identity, difference, and so on, saying, “This should not be declared.” According to this, it refers to speaking words to answer the question; it is not that remaining silent without answering is called setting aside. Past masters all said the fourth is called “silent answer”; this explanation is incorrect. Furthermore, the Mahāvibhāṣā (fascicle 15) states: “Just as when the non-Buddhists asked the World-Honoured One: ‘Is the world eternal?’ the Buddha said: ‘This should not be answered.’ By this one should know that speaking words constitutes an answer.”