tadetad asamyak / nahi vartamānacittalakṣaṇasya pūrvottarābhyāṃ nairantaryaṃ paramārthato 'stitadānīṃ tayor asattvāt /
This is incorrect, because there is no ultimate continuity between the present mind-characteristic and the prior and subsequent [moments], since at that time those two are non-existent.