Sarvadarshanasangraha 10.7

10.7

tatra mananam anumānādhīnam/ anumānaṃ ca vyāptijñānādhīnam/ vyāptijñānaṃ ca padārthavivekasāpekṣam/ ataḥ padārthaṣaṭkam athāto dharmaṃ vyākhyāsyāmaḥ ityādikāyāṃ daśalakṣaṇyāṃ kaṇabhakṣeṇa bhagavatā vyavasthāpitam/

Here thought depends on inference, and inference depends on the knowledge of the vyāpti (or universal proposition), and the knowledge of the vyāpti follows the right understanding of the categories,—hence the saint Kaṇāda[2] establishes the six categories in his tenfold treatise, commencing with the words, "Now, therefore, we shall explain duty."