Combining Texts

All the ideas for 'Symbolic Reasoning', 'Truth' and 'Ordinatio'

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7 ideas

3. Truth / F. Semantic Truth / 1. Tarski's Truth / a. Tarski's truth definition
14965 Truth rests on Elimination ('A' is true → A) and Introduction (A → 'A' is true) [Gupta]
3. Truth / F. Semantic Truth / 2. Semantic Truth
14968 A weakened classical language can contain its own truth predicate [Gupta]
4. Formal Logic / F. Set Theory ST / 3. Types of Set / b. Empty (Null) Set
21548 The null class is the class with all the non-existents as its members [MacColl, by Lackey]
5. Theory of Logic / L. Paradox / 6. Paradoxes in Language / a. The Liar paradox
14964 The Liar reappears, even if one insists on propositions instead of sentences [Gupta]
14969 Strengthened Liar: either this sentence is neither-true-nor-false, or it is not true [Gupta]
8. Modes of Existence / E. Nominalism / 1. Nominalism / b. Nominalism about universals
9103 A universal is not a real feature of objects, but only a thought-object in the mind [William of Ockham]
18. Thought / E. Abstraction / 2. Abstracta by Selection
9104 A universal is the result of abstraction, which is only a kind of mental picturing [William of Ockham]