Combining Texts

All the ideas for 'Cogitata et Visa', 'Whitehead and the Rise of Modern Logic' and 'Barcan Formulae'

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

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4 ideas

4. Formal Logic / D. Modal Logic ML / 7. Barcan Formula

15380

Barcan:nothing comes into existence; Converse:nothing goes out; Both:domain is unchanging [Vervloesem]

5. Theory of Logic / A. Overview of Logic / 7. Second-Order Logic

13639

Quine says higher-order items are intensional, and lack a clearly defined identity relation [Quine, by Shapiro]

6. Mathematics / C. Sources of Mathematics / 6. Logicism / b. Type theory

21557

Russell confused use and mention, and reduced classes to properties, not to language [Quine, by Lackey]

12. Knowledge Sources / D. Empiricism / 1. Empiricism

3648	Empiricists are collecting ants; rationalists are spinning spiders; and bees do both [Bacon]