Combining Texts

All the ideas for 'Exigency to Exist in Essences', 'Possible Worlds' and 'On the General Idea of Proof Theory'

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6 ideas

5. Theory of Logic / B. Logical Consequence / 1. Logical Consequence

13827

Logical consequence isn't a black box (Tarski's approach); we should explain how arguments work [Prawitz]

5. Theory of Logic / J. Model Theory in Logic / 1. Logical Models

13826

Model theory looks at valid sentences and consequence, but not how we know these things [Prawitz]

7. Existence / A. Nature of Existence / 5. Reason for Existence

19400

Possibles demand existence, so as many of them as possible must actually exist [Leibniz]

19401

God's sufficient reason for choosing reality is in the fitness or perfection of possibilities [Leibniz]

10. Modality / E. Possible worlds / 1. Possible Worlds / a. Possible worlds

19402

The actual universe is the richest composite of what is possible [Leibniz]

10. Modality / E. Possible worlds / 2. Nature of Possible Worlds / a. Nature of possible worlds

15793

We can take 'ways things might have been' as irreducible elements in our ontology [Stalnaker, by Lycan]