Combining Philosophers

All the ideas for Kurt Vonnegut, Hugh MacColl and Koen Vervloesem

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3 ideas

4. Formal Logic / D. Modal Logic ML / 7. Barcan Formula

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Barcan:nothing comes into existence; Converse:nothing goes out; Both:domain is unchanging [Vervloesem]

4. Formal Logic / F. Set Theory ST / 3. Types of Set / b. Empty (Null) Set

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The null class is the class with all the non-existents as its members [MacColl, by Lackey]

16. Persons / F. Free Will / 5. Against Free Will

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Out of more than a hundred planets, Earth is the only one with the idea of free will [Vonnegut]