The two Theories of Intentionality in Brentano and the Program of Psychology from an Empirical Standpoint

The paper defends the following thesis: the intentionality passage from Brentano’s Psychology from an Empirical Standpoint (1874) can be interpre- ted from two perspectives: intentionality as the most salient distinguishing feature separating the mental from the physical, and intentionality as a the- ory of the way in which mental acts, with their contents, are related to ex- tra-mental objects. Fundamentally, the theory of intentionality from 1874 is an example of the former. Its role is that of allowing the establishment of psychology as a science. However, it can also be understood as a theory of intentionality in the second sense through a clarification of the relations it entails between the content and the object of the act. For this reason, it could be said that the act–content–extra-mental object distinction was already achieved in the 1874 work, at least at the level of sensory acts. The distinction between the psychical act, the content, and the object presen- ted through this content was already made in the EL 80 Logik manuscript from 1869/70 at the level of nominal presentation, which provides a fur- ther argument for the above thesis.