Combining Philosophers

All the ideas for Theophrastus, Peter E. Pormann and Jan Lukasiewicz

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4 ideas

4. Formal Logic / E. Nonclassical Logics / 3. Many-Valued Logic

8942	Lukasiewicz's L3 logic has three truth-values, T, F and I (for 'indeterminate') [Lukasiewicz, by Fisher]

13. Knowledge Criteria / E. Relativism / 6. Relativism Critique

20921

How can we state relativism of sweet and sour, if they have no determinate nature? [Theophrastus]

22. Metaethics / B. Value / 2. Values / d. Health

22237

The Greeks had a single word meaning both 'beautiful' and 'good' [Pormann]

26. Natural Theory / A. Speculations on Nature / 2. Natural Purpose / c. Purpose denied

5990	Theophrastus doubted whether nature could be explained teleologically [Theophrastus, by Gottschalk]