Study on Intensional Logic based on the theory of the Brentano scholar Meinong (1853-1920).§Summary of contents:§1. Meinong's Theory of Objects: Elements of Object Theory§2. Formal Semantic Paradox in Meinong's Object Theory§3. Meinong's Theory of Defective Objects§4. The Object Theory Intentionality of Ontological Commitment§5. Logic, Mind, and Meinong§6. Meinong's Doctrine of the Modal Moment. Object Theory O: Syntax, Formation and Inference Principles§7. Semantics§8. Developments of the Logic. Philosophical Problems and Applications: Twardowski on Content and Object§9. Private Language and Private Mental Objects§10. God an Impossible Meinongian Object§11. Meinongian Models of Scientific Law§12. Aesthetics and Meinongian Logic of Fiction§13. The Paradox of Analysis