Combining Philosophers

All the ideas for Roy Bhaskar, Carl Hempel and Gerhard Gentzen

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12 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]
5. Theory of Logic / H. Proof Systems / 4. Natural Deduction
13832 Natural deduction shows the heart of reasoning (and sequent calculus is just a tool) [Gentzen, by Hacking]
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]
9. Objects / D. Essence of Objects / 5. Essence as Kind
15143 Kind essences are the categorical bases of a thing's causal powers [Bhaskar, by Chakravartty]
14. Science / A. Basis of Science / 4. Prediction
22179 Explanatory facts also predict, and predictive facts also explain [Hempel, by Okasha]
14. Science / D. Explanation / 1. Explanation / b. Aims of explanation
21507 Scientific explanation aims at a unifying account of underlying structures and processes [Hempel]
14. Science / D. Explanation / 2. Types of Explanation / e. Lawlike explanations
6755 For Hempel, explanations are deductive-nomological or probabilistic-statistical [Hempel, by Bird]
17083 The covering-law model is for scientific explanation; historical explanation is quite different [Hempel]
14. Science / D. Explanation / 2. Types of Explanation / g. Causal explanations
13052 Hempel rejects causation as part of explanation [Hempel, by Salmon]