成唯識論演祕 6.206

6.206

釋曰：破正量部，以彼計境相續有故，故但破見。又剎那論者有此覺時，色等現境亦皆已滅，如何此時許有現量？

The explanation is: This refutes the Saṃmatīya school, because they posit that the object exists continuously (saṃtāna); therefore, it only refutes the seeing. Furthermore, for the momentariness proponents (kṣaṇavādin), when this awareness occurs, present objects like form have also all already perished; how could one accept direct perception (pratyakṣa) at this time?