The Compendium of Caraka 3.4.5_2

3.4.5_2

kiṃ hyanupadiṣṭaṃ pūrvaṃ yattat pratyakṣānumānābhyāṃ parīkṣamāṇo vidyāt/tasmāddvividhā parīkṣā jñānavatāṃ pratyakṣam, anumānaṃ ca; trividhā vā sahopadeśena//

For what could one know while examining through direct perception and inference that has not previously been taught? Therefore, examination by the wise is twofold—direct perception and inference; or threefold along with instruction.