Combining Texts

All the ideas for 'works', 'Theological and other works' and 'Interview with Baggini and Stangroom'

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9 ideas

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]

8. Modes of Existence / C. Powers and Dispositions / 1. Powers

15312

We get the idea of power by abstracting from ropes, magnets and electric shocks [Priestley]

22. Metaethics / C. The Good / 1. Goodness / g. Consequentialism

6853	Consequentialism wrongly assumes a clear line between an act and its consequences [Crisp,R]

27. Natural Reality / B. Modern Physics / 4. Standard Model / a. Concept of matter

15311

Attraction or repulsion are not imparted to matter, but actually constitute it [Priestley]

27. Natural Reality / G. Biology / 4. Ecology

6854	Does the environment have value in itself? [Crisp,R]