Combining Texts

All the ideas for '', 'Basic Problems of Phenomenology' and 'Symbolic Reasoning'

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7 ideas

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 / 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 / C. Ontology of Logic / 2. Platonism in Logic

15571

The idea of an atemporal realm of validity is as implausible as medieval theology [Heidegger]

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

11212

The sense of a connective comes from primitively obvious rules of inference [Rumfitt]

11210

Standardly 'and' and 'but' are held to have the same sense by having the same truth table [Rumfitt]

19. Language / F. Communication / 3. Denial

11214

We learn 'not' along with affirmation, by learning to either affirm or deny a sentence [Rumfitt]

23. Ethics / F. Existentialism / 6. Authentic Self

15581

Dasein is always only that which it has chosen to be [Heidegger]