dṛśyatvena hi bhavatāṃ vyāpāro 'bhimataḥ, yathoktaṃ kumārilena ---"prākkāryaniṣpatter vyāpāro yasya dṛśyate" ityādi /
'Operation' has been held by you to be something perceptible, as asserted by Kumārila: "When the operation of something is perceived before the production of the effect."