Combining Texts

Ideas for 'Material Beings', 'Introduction to Mathematical Philosophy' and 'fragments/reports'

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7 ideas

10. Modality / B. Possibility / 8. Conditionals / c. Truth-function conditionals

12197

Inferring q from p only needs p to be true, and 'not-p or q' to be true [Russell]

14450

All forms of implication are expressible as truth-functions [Russell]

10. Modality / C. Sources of Modality / 5. Modality from Actuality

17572

Actuality proves possibility, but that doesn't explain how it is possible [Inwagen]

10. Modality / E. Possible worlds / 1. Possible Worlds / a. Possible worlds

14460

If something is true in all possible worlds then it is logically necessary [Russell]

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

17579

Counterparts reduce counterfactual identity to problems about similarity relations [Inwagen]

10. Modality / E. Possible worlds / 3. Transworld Objects / e. Possible Objects

17590

A merely possible object clearly isn't there, so that is a defective notion [Inwagen]

17591

Merely possible objects must be consistent properties, or haecceities [Inwagen]