Abstract

The principle of contradiction of Aristotle is the first one, only in the context of determined senses of the being . But it leaves out other senses of the being basic for the practical life. In Metaphysics IV they appear presuppositions previous to this hypothetical first principle, that leaves space to the human action. Some of those presuppositions are: 1) the being as potency; 2) the difference of senses; 3) the being as time; 4) the being as good