Combining Texts

All the ideas for 'fragments/reports', 'Abstract Entities' and 'works'

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10 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]

7. Existence / A. Nature of Existence / 4. Abstract Existence

14592

Some abstract things have a beginning and end, so may exist in time (though not space) [Swoyer]

7. Existence / D. Theories of Reality / 1. Ontologies

14594

Ontologists seek existence and identity conditions, and modal and epistemic status for a thing [Swoyer]

8. Modes of Existence / B. Properties / 1. Nature of Properties

14595

Can properties exemplify other properties? [Swoyer]

9. Objects / A. Existence of Objects / 5. Simples

14593

Quantum field theory suggests that there are, fundamentally, no individual things [Swoyer]

22. Metaethics / C. The Good / 2. Happiness / b. Eudaimonia

5996	Critolaus redefined Aristotle's moral aim as fulfilment instead of happiness [Critolaus, by White,SA]