Combining Texts

All the ideas for 'What is so bad about Contradictions?', 'New Foundations for Mathematical Logic' and 'The Problem of Possibilia'

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4 ideas

2. Reason / B. Laws of Thought / 3. Non-Contradiction
9123 Someone standing in a doorway seems to be both in and not-in the room [Priest,G, by Sorensen]
4. Formal Logic / F. Set Theory ST / 4. Axioms for Sets / a. Axioms for sets
9879 NF has no models, but just blocks the comprehension axiom, to avoid contradictions [Quine, by Dummett]
10. Modality / B. Possibility / 1. Possibility
9212 Possible states of affairs are not propositions; a proposition can't be a state of affairs! [Fine,K]
10. Modality / E. Possible worlds / 2. Nature of Possible Worlds / a. Nature of possible worlds
9213 The actual world is a possible world, so we can't define possible worlds as 'what might have been' [Fine,K]