E whakaae ana a Nyāya ki ngā Pramana e whā, hei tikanga pono mo te whiwhi mātauranga - Pratyakṣa (tirohanga), Anumāṇa (whakapaunga), Upamāṇa (whakataurite me te tauritenga) me te Śabda (kupu, whakaaturanga o ngā tohunga pono o mua, o ēnei wā rānei).