Combining Texts

All the ideas for 'On the Soul (frags)', 'Possible Worlds and Necessary A Posteriori' 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]

9. Objects / D. Essence of Objects / 9. Essence and Properties

14633

How do we tell a table's being contingently plastic from its being essentially plastic? [Jackson]

14635

An x is essentially F if it is F in every possible world in which it appears [Jackson]

9. Objects / D. Essence of Objects / 15. Against Essentialism

14632

Quine may have conflated de re and de dicto essentialism, but there is a real epistemological problem [Jackson]

10. Modality / D. Knowledge of Modality / 3. A Posteriori Necessary

14631

How can you show the necessity of an a posteriori necessity, if it might turn out to be false? [Jackson]

17. Mind and Body / E. Mind as Physical / 3. Eliminativism

5997	Dicaearchus said soul does not exist, but is just a configuration of the body [Dicaearchus, by Fortenbaugh]