THE PRINCIPLE OF CERTAINTY ARISES FROM THE AXIOMS OF PHILOCHRONY 1- Time is the continuous succession of irreversible moments. ---> 2- Duration is the time interval and comprises a beginning and an end. -- b ------- e ---> 3- The time of uniform and periodic rhythm (mathematical) is taken as a reference to measure the duration of events. 4- Chromnesia is the certainty that there are past events and there will be future events. 5- Time is magnitive, that is, objective, measurable and imperceptible. The statement: Past does not exist and future is uncertain, it is true, but at the same time it denies the events of the past and makes people not plan for the future. By means of chromnesia or philochron certainty, we think, for example, that today is Saturday and tomorrow will be Sunday, the Sun will rise at a certain time and it will be set at another time.