Combining Texts

All the ideas for 'Remarks on the Foundations of Mathematics', 'Logic [1897]' and 'Letters to a Young Clergyman'

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4 ideas

2. Reason / A. Nature of Reason / 9. Limits of Reason

22520

You can't reason someone out of an irrational opinion [Swift]

3. Truth / H. Deflationary Truth / 1. Redundant Truth

11074

'It is true that this follows' means simply: this follows [Wittgenstein]

6. Mathematics / C. Sources of Mathematics / 6. Logicism / a. Early logicism

11073

Two and one making three has the necessity of logical inference [Wittgenstein]

13. Knowledge Criteria / C. External Justification / 2. Causal Justification

11052

Psychological logic can't distinguish justification from causes of a belief [Frege]