Ideas of Alexius Meinong, by Theme

[Austrian, 1853 - 1920, Studied with Brentano. Professor at the University of Graz.]

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4. Formal Logic / E. Nonclassical Logics / 6. Free Logic
So-called 'free logic' operates without existence assumptions [George/Van Evra]
7. Existence / A. Nature of Existence / 3. Being / d. Non-being
Meinong said all objects of thought (even self-contradictions) have some sort of being [Lycan]
The objects of knowledge are far more numerous than objects which exist
9. Objects / A. Existence of Objects / 2. Abstract Objects / c. Modern abstracta
There can be impossible and contradictory objects, if they can have properties [Friend]
9. Objects / A. Existence of Objects / 3. Objects in Thought
There are objects of which it is true that there are no such objects
Meinong says an object need not exist, but must only have properties [Friend]