大乘百法明門論開宗義決 1.203

1.203

俱舍更加貪嗔慢疑所在諸地等者。地不定者。謂不如彼通大地法一一通於一切心地。善大地法遍於善地。染大地法通於染地。是故說為諸地不定。見修不定者　謂具見修二種斷者。入煩惱中慢唯修斷疑唯見斷。惡作修斷。是故名為見修不定。諸位心所亦不定者。且如欲界有四位心。謂善不善有覆無覆。於此四位心所之中。而前八種有無不定。故此八種立不定名。

"The Kośa additionally adds greed, anger, conceit, and doubt, and the grounds in which they exist," and so forth: "indeterminate regarding grounds" means that they are not like those sarva-mahābhūmika-dharmas, each of which universally permeates all grounds of mind; the kuśala-mahābhūmika-dharmas permeate the wholesome grounds, and the kleśa-mahābhūmika-dharmas permeate the defiled grounds. Therefore, they are spoken of as indeterminate regarding the grounds. "Indeterminate regarding seeing and cultivation" refers to having both kinds of abandonment by seeing and by cultivation. Among the afflictions, conceit is severed only by cultivation, doubt is severed only by seeing, and remorse is severed by cultivation; therefore, they are called indeterminate regarding seeing and cultivation. "The mental factors in the various states are also indeterminate": for instance, in the desire realm there are four states of mind, namely wholesome, unwholesome, obstructed-indeterminate, and unobstructed-indeterminate. Among the mental factors in these four states, the presence or absence of the previous eight is indeterminate. Therefore, these eight are given the name indeterminate.