The paper attempts to clarify some conceptual, epistemological, and ontological issues connected with so?called psi phenomena. In part I an attempt is made to clarify the various ways in which the concept of psi may be used. The concept is tied to the concept of intentional content. Part II discusses how psi phenomena can be verified/falsified and in what sense parapsychology may be a scientific discipline in spite of there being no empirically well?founded theories about psi as such. In part (...) III an attempt is made to clarify the sense in which psi phenomena may support a dualist position and undermine a materialist position. It is argued that psi phenomena support some sort of dualist position. (shrink)