etadevaṃ manye saugatatīrthikayor abhīṣṭasya manasaḥ siddhyasiddhyartham idaṃ "yugapat jñānānutpattir manaso liṅgam" iti sūtraṃ
I think this sūtra stating "the non-simultaneous arising of cognitions is the mark of mind" [serves] for the purpose of proving and disproving the mind as desired by the Buddhist and [other] philosophers.