Abstract

Theoretical concepts such as "super ego" and "intelligent" are prevalent in scientific hypotheses and theories and have been treated differently by philosophers. Those who advocate empiricism believe that such concepts should be defined explicitly or reduced to the senses. Based on this notion, empiricists hold the view that a rule can be empirical only when its entire aspects are observable.Some others, however, adhere to the belief that these concepts have an essential nature and, therefore, cannot be sensed.And yet there is a third group who maintain that the theoretical concepts either have actual references i.e., they are self -subsistent notions or have mental references. The latter being the case, the concepts are sensible either potentially or practically.As for how these concepts have been developed, it should be noted that they are the result of long-lasting deductions and reasoning.