成唯識論述記 5.161

5.161

述曰：又種是假，望現行法應無因緣；非實有故；如無法等。此等以教附理，非前第三師無教難。

The Commentary states: Furthermore, if seeds were conventional, they should lack the status of being a cause-and-condition in relation to active phenomena, because they would not be substantially existent, like non-existent dharmas and the like. These [arguments] base reason upon scripture; they are not the objection lacking scripture made previously by the third master.