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All the ideas for 'Letters to Varignon', '04: Gospel of St John' and 'works'

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8 ideas

2. Reason / A. Nature of Reason / 2. Logos

6294	In the beginning was the Word, and the Word was with God, and the word was God [John]

3. Truth / A. Truth Problems / 2. Defining Truth

8821	Jesus said he bore witness to the truth. Pilate asked, What is truth? [John]

5. Theory of Logic / A. Overview of Logic / 2. History of Logic

11022

Gentzen introduced a natural deduction calculus (NK) in 1934 [Gentzen, by Read]

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

11065

The inferential role of a logical constant constitutes its meaning [Gentzen, by Hanna]

11023

The logical connectives are 'defined' by their introduction rules [Gentzen]

11213

Each logical symbol has an 'introduction' rule to define it, and hence an 'elimination' rule [Gentzen]

6. Mathematics / B. Foundations for Mathematics / 4. Axioms for Number / g. Incompleteness of Arithmetic

10067

Gentzen proved the consistency of arithmetic from assumptions beyond arithmetic [Gentzen, by Musgrave]

27. Natural Reality / G. Biology / 3. Evolution

19414

Men are related to animals, which are related to plants, then to fossils, and then to the apparently inert [Leibniz]