Combining Texts

Ideas for 'Axiomatic Theories of Truth (2005 ver)', 'Gentzen's Analysis of First-Order Proofs' and 'After Virtue: a Study in Moral Theory'

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5 ideas

5. Theory of Logic / A. Overview of Logic / 1. Overview of Logic

13831

Logic is based on transitions between sentences [Prawitz]

5. Theory of Logic / C. Ontology of Logic / 1. Ontology of Logic

15652

We can use truth instead of ontologically loaded second-order comprehension assumptions about properties [Halbach]

5. Theory of Logic / E. Structures of Logic / 2. Logical Connectives / a. Logical connectives

13825

Natural deduction introduction rules may represent 'definitions' of logical connectives [Prawitz]

5. Theory of Logic / E. Structures of Logic / 7. Predicates in Logic

15651

Instead of saying x has a property, we can say a formula is true of x - as long as we have 'true' [Halbach]

5. Theory of Logic / H. Proof Systems / 4. Natural Deduction

13823

In natural deduction, inferences are atomic steps involving just one logical constant [Prawitz]