Combining Texts

All the ideas for 'works', 'On Truth and Lies in a Nonmoral Sense' and 'The Problem of Counterfactual Conditionals'

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

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3 ideas

5. Theory of Logic / G. Quantification / 2. Domain of Quantification

17743

De Morgan introduced a 'universe of discourse', to replace Boole's universe of 'all things' [De Morgan, by Walicki]

10. Modality / B. Possibility / 9. Counterfactuals

12191

Counterfactuals are true if logical or natural laws imply the consequence [Goodman, by McFetridge]

15. Nature of Minds / C. Capacities of Minds / 3. Abstraction by mind

20363

Leaves are unequal, but we form the concept 'leaf' by discarding their individual differences [Nietzsche]