Combining Texts

All the ideas for 'Metaphysics', 'Practical Necessity' and 'A Note on the entscheidungsproblem'

expand these ideas     |    start again     |     specify just one area for these texts

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3 ideas

5. Theory of Logic / K. Features of Logics / 7. Decidability

18758

Validity is provable, but invalidity isn't, because the model is infinite [Church, by McGee]

7. Existence / C. Structure of Existence / 8. Stuff / a. Pure stuff

16771

A composite is a true unity if all of its parts fall under one essence [Scheibler]

10. Modality / A. Necessity / 10. Impossibility

23283

Necessity implies possibility, but in experience it matters which comes first [Williams,B]