Combining Texts

All the ideas for 'Dthat', 'Mathematical Logic (revised)' and 'Letters to Queen Charlotte'

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8 ideas

5. Theory of Logic / E. Structures of Logic / 4. Variables in Logic

12221

'Corner quotes' (quasi-quotation) designate 'whatever these terms designate' [Quine]

5. Theory of Logic / F. Referring in Logic / 1. Naming / f. Names eliminated

19321

We might do without names, by converting them into predicates [Quine, by Kirkham]

6. Mathematics / B. Foundations for Mathematics / 4. Axioms for Number / a. Axioms for numbers

23026

We know mathematical axioms, such as subtracting equals from equals leaves equals, by a natural light [Leibniz]

9. Objects / D. Essence of Objects / 7. Essence and Necessity / b. Essence not necessities

13189

A necessary feature (such as air for humans) is not therefore part of the essence [Leibniz]

10. Modality / D. Knowledge of Modality / 1. A Priori Necessary

19432

Intelligible truth is independent of any external things or experiences [Leibniz]

12. Knowledge Sources / B. Perception / 2. Qualities in Perception / d. Secondary qualities

19430

We know objects by perceptions, but their qualities don't reveal what it is we are perceiving [Leibniz]

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

19431

There is nothing in the understanding but experiences, plus the understanding itself, and the understander [Leibniz]

19. Language / B. Reference / 3. Direct Reference / b. Causal reference

14080

Are causal descriptions part of the causal theory of reference, or are they just metasemantic? [Kaplan, by Schaffer,J]