Sages Kanaada and Gautama have enumerated and explained the elementary categories (padartha-s) of nature in Nyaya and Vaisheshika Shastra-s. The combination of that which has been discussed by these 2 sages is the subject matter of the Tarkashastra. Similar to Vyakarana, Tarkashastra is considered a meta-discipline, whose knowledge is essential for studying any other shastra. […]