成唯識論述記 4.379

4.379

述曰：子段第二立六量非。此二位中必無轉識；行相、所緣不可知故；如無心位。正破薩婆多，引三位無心為喻。若兼破經部等，即前二散、及與二定、無想五位。然彼二部等說五識無，執有意識，然今此中正破彼意識，及設遮五，通言六識。非正遮計，此即難全無。

The Commentary states: The second subdivision establishes the syllogism that the six [consciousnesses] are incorrect. In these two states there are definitely no evolving consciousnesses; because their activities and cognitive objects are unknowable; like the mindless state. This directly refutes the Sarvāstivādin, citing the three mindless states as examples. If it concurrently refutes the Sautrāntikas and others, then it refers to the former two distracted states, together with the two absorptions and non-conception, making five states. However, those two schools assert that the five consciousnesses do not exist while holding that the mental consciousness exists; but now, herein, it directly refutes their mental consciousness, and hypothetically negates the five, speaking generally of the six consciousnesses. It does not directly negate the conceptualization [of an eighth], but rather challenges [the view that there is] total non-existence.