Abstract
This text aims to show how some substantial ontological conclusions, consistent with the notion of ‘complexity’, can be demonstrated through elementary phenomenological analyzes. In particular, we will show that it is necessary to acknowledge an ontology where the forms of ontological efficacy cannot be reduced to efficient causality, the relations between properties are irreducible to deduction, irreducible qualities must exist originally, further qualities emerge from existing qualities, and no explanatory key less complex than the fullness of consciousness’ functions can account for reality.