 As regards some of the particulars of Brentano’s descriptive psychology, most important for understanding Marty’s philosophy of language are 1) Brentano’s thesis that mental phenomena (or acts of consciousness) are intentionally directed (as consciousness of an object), 2) his classification of mental phenomena into three basic groups: presentations (Vorstellungen), judgments (Urteile), and phenomena of love (Liebe) and hate (Haß), as already indicated in the division of practical philosophy into three corresponding disciplines, 3) his characterization of all judgments as instances of acceptance or rejection which can be formulated in existential statements (“A exists”, “A does not exist”), and 4) his view that every act of consciousness is inwardly perceived (innerlich wahrgenommen), though never inwardly observed (innerlich beobachtet)in the sense of being an object of attention. In addition, 5) an important ontological position held by Brentano in his Vienna period should be mentioned here, namely his distinction between reality and existence. While he held that existence corresponds to truth in all cases, reality is limited to substances and everything that pertains to substances (i.e. whatever belongs to the Aristotelian categories). Accordingly anything that can be accepted in a true judgment can correctly be said to exist, including possibilities and impossibilities, whereas not everything that exists in this sense is real. During this time Brentano allowed for a host of irrealia, such as a lack, a possibility, an impossibility, etc.