Combining Texts

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

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5 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]

5. Theory of Logic / C. Ontology of Logic / 1. Ontology of Logic

21222

Logicians presuppose a world, and ignore logic/world connections, so their logic is impure [Husserl, by Velarde-Mayol]

21223

Phenomenology grounds logic in subjective experience [Husserl, by Velarde-Mayol]

6. Mathematics / B. Foundations for Mathematics / 1. Foundations for Mathematics

21224

Pure mathematics is the relations between all possible objects, and is thus formal ontology [Husserl, by Velarde-Mayol]