Combining Texts

All the ideas for 'Set Theory and related topics (2nd ed)', 'Letter to Peter Wilhelm Lund' and 'works'

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3 ideas

3. Truth / A. Truth Problems / 8. Subjective Truth

16005

I recognise knowledge, but it is the truth by which I can live and die that really matters [Kierkegaard]

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]

18. Thought / E. Abstraction / 8. Abstractionism Critique

8638	Thomae's idea of abstract from peculiarities gives a general concept, and leaves the peculiarities [Frege on Thomae]