成唯識論演祕 7.202

7.202

釋曰：遍計無體，故是「不生」。為境能生能執心等，名「能生生」。依他有體，緣起名「生」。能生依他，名為「生生」；能生執彼不生之心，名「生不生」。

The commentary states: The parikalpita is devoid of substance, hence it is 'non-originated.' Serving as an object, it is able to produce the mind capable of grasping and so forth, hence it is called 'able to produce the originated.' The paratantra has substance, and conditioned arising is called 'originated.' Being able to produce the paratantra is called 'producing the originated'; being able to produce the mind that grasps that non-originated nature is called 'producing the non-originated.'