E1P2D
Demonstration — Part I
Latin
Patet etiam ex definitione 3. Unaquæque enim in se debet esse et per se debet concipi sive conceptus unius conceptum alterius non involvit.
English (Elwes 1883)
Also evident from Def. iii. For each must exist in itself, and be conceived through itself; in other words, the conception of one does not imply the conception of the other.