俱舍論頌疏論本 13.64

13.64

釋曰：無表記餘三者，三性分別，謂無表色不通無記，唯善惡性，故說記言。餘謂表業及與意思皆通三性。問：「何故無表不通無記？」答：「以無記心勢力微劣，不能引發強無表業，可因滅時，果仍續起，故無表業非無記也。」

The explanation says: "Avijñapti is declared; the remaining three [exist in all]" is the differentiation of the three moral natures. That is, avijñapti-rūpa does not extend to the indeterminate; it is only wholesome or unwholesome in nature, hence it is said to be "declared" (vyākṛta). "The remaining" refers to vijñapti karma and mental volition, which both extend to all three moral natures. Question: "Why does avijñapti not extend to the indeterminate?" Answer: "Because the strength of an indeterminate mind is weak and feeble, it cannot initiate strong avijñapti karma such that when the cause has ceased, the fruit still continues to arise; therefore avijñapti karma is not indeterminate."