dhiyo 'sitādirūpatve sati sā nīlādyākārasyaivaikasya jñānagatasyopalambhād bāhyo 'rthaḥ parokṣa eva bhaven na pratyakṣaḥ /
If cognition has forms like white etc., then since only one form of blue etc. residing in the cognition is apprehended, the external object would be only indirect, not perceptual.