Combining Texts

All the ideas for 'Presidential Address of Am. Math. Soc', 'Ignorance: a Case for Scepticism' and 'Symbolic Reasoning'

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5 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 / 2. History of Logic

10247

We have no adequate logic at the moment, so mathematicians must create one [Veblen]

13. Knowledge Criteria / C. External Justification / 6. Contextual Justification / b. Invariantism

8724	The meaning of 'know' does not change from courtroom to living room [Unger]

13. Knowledge Criteria / D. Scepticism / 1. Scepticism

8722	No one knows anything, and no one is ever justified or reasonable [Unger]

13. Knowledge Criteria / D. Scepticism / 4. Demon Scepticism

8723	An evil scientist may give you a momentary life, with totally false memories [Unger]