n~a^ta-, ti^rana-, paha^na-p., belong to the exegetical literature, but they are already implied in Pts.M. I. 87: ”Abhin~n~a^-pan~n~a^ n~a^tatthe n~a^nam, parin~n~a^-pan~n~a^ ti^ranatthe n~a^nam, paha^na-pan~n~a^ paricca^gatthe n~a^nam ... ye ye dhamma^ abhin~n~a^ta^ honti, te te dhamma^ n~a^ta honti ... ti^rita^ ... pahi^na^.”
”full understanding”, full comprehension. There are 3 kinds of mundane f.u. (lokiya-p.), namely: full understanding of the known (n~a^ta-p.), f.u. as investigating (ti^rana-p.), and f.u. as overcoming (paha^na-p.) In Vis.M. XX, 3 it is said:
"Full understanding of the known is the knowledge consisting in the discernment of the specific characteristics of such and such phenomena, as: ”Corporeality has the characteristic of being oppressed; feeling has the characteristic of being felt, etc.”
"Full understanding by investigating is that insight-wisdom (vipassana^-pan~n~a^; s. vipassana^), which has the 3 general characteristics (impermanence, suffering, not-self) as its objects, and which arises when attributing a general characteristic to (physical and mental) phenomena, as for instance: ”Corporeality is impermanent, feeling is impermanent, etc.”
"Full understanding by overcorning is that insight-wisdom which has the above mentioned general characteristics as its objects, and arises after overcoming the idea of permanence, etc." - (App.).