八識規矩補註 2.5

2.5

Following the darśanabhāga of the eighth [consciousness] that it cognizes, this seventh consciousness grasps it as a self. "Grasping" means clinging and adherence. Because this consciousness is endowed solely with the innate two grasps of self and dharmas, arising spontaneously, these are not the conceptually differentiated two grasps of self and dharmas. Why is this? Because they do not arise through forceful deliberation and calculation. Among the three pramāṇas, it is solely fallacious cognition; because it does not know in accord with the objective realm and constantly calculates erroneously, it is fallacious cognition.