Combining Philosophers

All the ideas for Pittacus, Dag Prawitz and Pierre Hadot

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9 ideas

1. Philosophy / D. Nature of Philosophy / 6. Hopes for Philosophy

9198	It is no longer possible to be a sage, but we can practice the exercise of wisdom [Hadot]

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

9197	The logos represents a demand for universal rationality [Hadot]

5. Theory of Logic / A. Overview of Logic / 1. Overview of Logic

13831

Logic is based on transitions between sentences [Prawitz]

5. Theory of Logic / B. Logical Consequence / 1. Logical Consequence

13827

Logical consequence isn't a black box (Tarski's approach); we should explain how arguments work [Prawitz]

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

13825

Natural deduction introduction rules may represent 'definitions' of logical connectives [Prawitz]

5. Theory of Logic / H. Proof Systems / 4. Natural Deduction

13823

In natural deduction, inferences are atomic steps involving just one logical constant [Prawitz]

5. Theory of Logic / J. Model Theory in Logic / 1. Logical Models

13826

Model theory looks at valid sentences and consequence, but not how we know these things [Prawitz]

10. Modality / A. Necessity / 8. Transcendental Necessity

3016	Even the gods cannot strive against necessity [Pittacus, by Diog. Laertius]

22. Metaethics / C. The Good / 3. Pleasure / b. Types of pleasure

9196	The pleasure of existing is the only genuine pleasure [Hadot]