Abstract

Franz Brentano’s thesis that the mental is characterised by a peculiar directedness towards an object or by intentionality, has been recognised, in contemporary philosophy, by a large body of philosophers of widely differing persuasions. Those who have come to terms with this phenomenon have found a place for it within their larger philosophical positions: this affects the way they understand the nature and role of intentionality. In this essay, I will distinguish four types of theories of intentionality—each of which is characterized by a certain understanding of its nature and function, an understanding which derives from the overall philosophical framework within which the phenomenon of intentionality is situated. These are the naturalistic-causal, the descriptive psychological, the existential, and the transcendental-constitutive theories. I review them in that order, as representing four levels of our understanding of intentionality. For all four, Brentano’s thesis remains the “neutral” and indispensable starting point.