Combining Texts

All the ideas for 'Isagoge ('Introduction')', 'works' and 'Elements of Intuitionism (2nd ed)'

expand these ideas     |    start again     |     specify just one area for these texts

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3 ideas

4. Formal Logic / E. Nonclassical Logics / 2. Intuitionist Logic

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Mathematical statements and entities that result from an infinite process must lack a truth-value [Dummett]

8. Modes of Existence / D. Universals / 1. Universals

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Are genera and species real or conceptual? bodies or incorporeal? in sensibles or separate from them? [Porphyry]

23. Ethics / C. Virtue Theory / 3. Virtues / d. Courage

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Courage is not a virtue, but the form of every virtue at its testing point [Lewis,CS]