   Some of the leading ideas of the phenomenological tradition can be traced back to this issue. Following the lead of Edmund Husserl (1900, 1913), who was both the founder of phenomenology and a student of Brentano’s, the point of the phenomenological analysis has been to show that the essential property of intentionality of being directed onto something is not contingent upon whether some real physical target exists independently of the intentional act itself. To achieve this goal, two concepts have been central to Husserl’s internalist interpretation of intentionality: the concept of a noema (plural noemata) and the concept of epoche (i.e., bracketing) or phenomenological reduction. By the word ‘noema,’ Husserl refers to the internal structure of mental acts. The phenomenological reduction is meant to help get at the essence of mental acts by suspending all naive presuppositions about the difference between real and fictitious entities (on these complex phenomenological concepts, see the papers by Føllesdal and others conveniently gathered in Dreyfus (1982). For further discussion, see Bell (1990) and Dummett (1993).