Combining Texts

All the ideas for 'Symbolic Reasoning', 'On Fate ('De fato')' and 'What is a Leading Principle?'

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5 ideas

4. Formal Logic / F. Set Theory ST / 3. Types of Set / b. Empty (Null) Set

21548

The null class is the class with all the non-existents as its members [MacColl, by Lackey]

5. Theory of Logic / D. Assumptions for Logic / 1. Bivalence

21677

How can the not-true fail to be false, or the not-false fail to be true? [Cicero]

11. Knowledge Aims / A. Knowledge / 4. Belief / c. Aim of beliefs

14781

A 'belief' is a habit which determines how our imagination and actions proceed [Peirce]

19. Language / F. Communication / 1. Rhetoric

21667

Oratory and philosophy are closely allied; orators borrow from philosophy, and ornament it [Cicero]

22. Metaethics / A. Ethics Foundations / 1. Nature of Ethics / g. Moral responsibility

21678

If desire is not in our power then neither are choices, so we should not be praised or punished [Cicero]