Combining Texts

All the ideas for '', 'Letters to Blijenburgh' and 'Set Theory and related topics (2nd ed)'

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7 ideas

4. Formal Logic / F. Set Theory ST / 3. Types of Set / e. Equivalence classes
8920 Equivalence relations are reflexive, symmetric and transitive, and classify similar objects [Lipschutz]
5. Theory of Logic / A. Overview of Logic / 1. Overview of Logic
11211 If a sound conclusion comes from two errors that cancel out, the path of the argument must matter [Rumfitt]
5. Theory of Logic / E. Structures of Logic / 2. Logical Connectives / a. Logical connectives
11210 Standardly 'and' and 'but' are held to have the same sense by having the same truth table [Rumfitt]
11212 The sense of a connective comes from primitively obvious rules of inference [Rumfitt]
19. Language / F. Communication / 3. Denial
11214 We learn 'not' along with affirmation, by learning to either affirm or deny a sentence [Rumfitt]
28. God / A. Divine Nature / 3. Divine Perfections
7829 God no more has human perfections than we have animal perfections [Spinoza]
28. God / C. Attitudes to God / 4. God Reflects Humanity
7830 A talking triangle would say God is triangular [Spinoza]