俱舍論記 2.141

2.141

「以即見色至亦能了別」者，識見家答。如一慧體，推求名見，亦名簡擇。識亦應然，亦名能見亦能了別。有慧非見，故言少分慧，如盡智等。有識非見，如耳識等，故言少分識。

"Because the seeing of forms itself […] is also able to discern" is the reply by the proponent of consciousness seeing. Just as in the case of a single entity of discernment (prajñā), when investigating it is called 'seeing' and it is also called 'discrimination.' It should be the same with consciousness: it is called both that which sees and that which discerns. There is discernment that is not seeing, hence it says "a portion of discernment," such as the knowledge of destruction (kṣaya-jñāna) and the like. There is consciousness that is not seeing, such as auditory consciousness and the like, hence it says "a portion of consciousness."