The place of Derivative perceptions in Human life

Derivative perceptions as a particular kind of conceptions are generated in an un conscious and involuntary way in order to satisfy the natural and social needs of human beings (and animals). In fact, these concepts and perceptions have an instrumental role and are useful for practical purposes and man needs them in his personal and social life.Familiarity with this kind of perceptions and differentiating them from real perceptions is of utmost importance since they save us from many misgivings in epistemology, in cluding the problem of urelatirity of knowledge” and unstability of rational principles. Also, knowing that the human sciences are divided into real and derivative will prevent us from thinking that human knowledge is solely obtainable in a natural and involuntary way. Indeed, the reason why some people have thought that human knowledge is obtained involuntarily and is subject to internal and external motives, is the existence of these kind of derivative and practical concepts among human perception.