Nyanya secara tradisional nerima Catur Pramana pinaka sarana sane dados kaandelin anggena ngemolihang kaweruhan - Pratyaksa (persepsi), Anumāṇa (panyirempenan), Upamāṇa (pabandingan lan analogi) lan Sabda (kruna, testimoni para ahli sane terpracarya ring pidan utawi mangkin).
Nyāya traditionally accepts four Pramanas as reliable means of gaining knowledge – Pratyakṣa (perception), Anumāṇa (inference), Upamāṇa (comparison and analogy) and Śabda (word, testimony of past or present reliable experts).