concurrent cause

from The Light of Wisdom Vol. 1, pgs. 252-253:

• The single-nature ignorance is presence of the mere quality of not recognizing pure nature of sugata essence, the subtle cause for the cognitive obscuration in not recognizing one's nature at the time of the space of all-ground, which is undecided as to being pure or impure and which has not split up into the division of confusion and liberation. JOKYAB

• The cause which is concurrent with the preceding and the proceeding is ignorance which is accompanying, or coemergent with pure dharmata. Such is the cognizant and nonconceptual all-ground consciousness, which is the actual cognitive obscuration and is present as the potential for the confusion of the seven collections to arise when meeting with an object condition. JOKYAB

• The mutually cooperating cause is conceptual mind consciousness, the conceptual ignorance which is the cognizant quality of this all-ground which, without any other assistance than itself, apprehends as a self-entity itself as being the inner subject, the empty aspect, and which labels as good or bad the external objects, this manifest aspect as these five sense objects. JOKYAB

• The perpetuating cause, from the obscuration of disturbing emotions which have appeared, to virtue and nonvirtue which appear due to the seven collections and their subsidiary aspects, is what has power to definitely yield its individual result of virtue or nonvirtue through accumulating karmic tendencies of the seven collections. Such is present in [or as] all-ground consciousness. JOKYAB