Combining Texts

Ideas for 'Frege's Theory of Numbers', 'The Theory of Objects' and 'Barcan Formulae'

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2 ideas

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

15380

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

4. Formal Logic / E. Nonclassical Logics / 6. Free Logic

8250	So-called 'free logic' operates without existence assumptions [Meinong, by George/Van Evra]