Combining Texts

All the ideas for 'Two Problems of Epistemology', 'Counterparts and Identity' and 'The World'

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9 ideas

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

18823

To say there could have been people who don't exist, but deny those possible things, rejects Barcan [Stalnaker, by Rumfitt]

10. Modality / E. Possible worlds / 3. Transworld Objects / c. Counterparts

16409

Unlike Lewis, I defend an actualist version of counterpart theory [Stalnaker]

16411

If possible worlds really differ, I can't be in more than one at a time [Stalnaker]

16412

If counterparts exist strictly in one world only, this seems to be extreme invariant essentialism [Stalnaker]

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

22593

Our sensation of light may not be the same as what produces the sensation [Descartes]

14. Science / A. Basis of Science / 6. Falsification

18284

Particulars can be verified or falsified, but general statements can only be falsified (conclusively) [Popper]

19. Language / C. Assigning Meanings / 8. Possible Worlds Semantics

16410

Extensional semantics has individuals and sets; modal semantics has intensions, functions of world to extension [Stalnaker]

26. Natural Theory / A. Speculations on Nature / 6. Early Matter Theories / f. Ancient elements

16569

The Hot, Cold, Wet and Dry of the philosophers need themselves to be explained [Descartes]

27. Natural Reality / A. Classical Physics / 1. Mechanics / b. Laws of motion

20964

Descartes said there was conservation of 'quantity of motion' [Descartes, by Papineau]