俱舍論記 13.181

13.181

「若據勝義至故無有過」者，答。若據勝義不善，誠如所言，無彼二性。然於此有漏法中立善無記，約異熟果說。諸有漏法中，若不能記異熟果者，立無記名。於有漏法中，若能記愛異熟果者，說名為善。故無有過。

Regarding the passage from "If judged in the ultimate sense..." up to "hence there is no fault": this answers. If judged in terms of the unwholesome in the ultimate sense, it is truly as you have said: those two natures do not exist. However, the establishment of the good and the neutral among these sāsrava phenomena is spoken of in terms of their fruitions of maturation (vipāka-phala). Among sāsrava phenomena, those that cannot be predicted to yield a maturation fruit are given the name "neutral." Among sāsrava phenomena, those that can be predicted to yield a desirable maturation fruit are called "good." Hence there is no fault.