Abstract
Concepts,as we define them here,have a built-in structure which based on some axioms,result into two hypotheses. The first hypothesis leads us to the birth of noesis as a concept in its own,while the second one,in turn,leads us to conclusions that are incomprehensible. The birth of noesis is an action of noesis itself,hence we are talking about a self-determination,from where the concepts of space and time emerge. So,from the first hypothesis,we end up to a mental birth of the natural world. The mental passing from the second hypothesis to the first one,has a -close enough- resemblance to the big-bang. That is,as Universe was risen from a big-bang of matter,in the same way the set of concepts commences from a big-bang of noesis. The set of concepts (ennoias) is a mental representation of Universe and Universe is the set of determinations coming from noesis. Finally self-determination of noesis leads us to a conclusion that can be used as a basis to explain many Quantum Mechanics phenomena.