大般涅槃經義記 2.76

2.76

二彰問差別。問別有六：一者疑問，亦名請問，如言「云何得長壽」等；二者求問，如言「願佛開微密」等；三者難問，如言「三乘若無性」等；四者責問，如言「如其斷疑，云何不定說」等；五者讚問，如言「眾生大依止」等，迦葉欲難，將奪先與而為讚嘆，是故雖讚而得為問；六者謙問，如下文言「今欲問蔭我無智」等，謙己不堪而起後說，故名謙問。問別如此。

Second, revealing the distinctions among the questions. The questions are distinguished into six types: (1) doubt-questions, also called asking-questions, as when saying "How is long life attained?" and so forth; (2) seeking-questions, as when saying "May the Buddha open the subtle and secret," and so forth; (3) objection-questions, as when saying "If the three vehicles lack nature," and so forth; (4) reproach-questions, as when saying "If he cuts off doubt, why does he not explain definitively?" and so forth; (5) praise-questions, as when saying "The great refuge of sentient beings," and so forth—Kāśyapa wishes to object, but first concedes in order to take away, offering praise, and therefore, though praise, it constitutes a question; (6) humble questions, as in the text below saying "Now wishing to ask about the aggregates, I lack wisdom," and so forth—humbling oneself as incapable and thereby initiating the subsequent exposition, hence called humble questions. The distinctions among the questions are thus.