Plotinus (205-270): Plotinus??? principal assumptions can be stated as follows: (1) truth exists and that it is the way the world exists in the mind or the intellect; (2) the awareness of the world as it exists in the intellect is knowledge; and (3) two kinds of truth exist, the contingent truth is that ten coins are in pocket, and a necessary truth is that four plus six equals to ten. 529: Closur