A Brief Conclusion
I would like the reader to take away from this book the following morals.First, Brentano was wrong to say that intentionality is the most distinctive mark of mental phenomena (see PES, 75 [I, 137]). Our conception of mental phenomena in not unified by the thesis that all and only mental acts have an object. It cannot be so unified because the notion of direction or of-ness itself is neither unified nor generally applicable to mental phenomena. Even if intentionality is a first-person concept that one can only come to grasp if one can instantiate and introspectively access mental acts, propositional and interrogative attitudes pose insuperable problems for Brentano’s Thesis....