Combining Texts

All the ideas for 'Necessary Existents', 'Building Blocks of Mathematical Logic' and 'Questions on Aristotle's Posterior Analytics'

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3 ideas

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

17699

Variables are auxiliary notions, and not part of the 'eternal' essence of logic [Schönfinkel]

12. Knowledge Sources / B. Perception / 2. Qualities in Perception / b. Primary/secondary

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Why can't we deduce secondary qualities from primary ones, if they cause them? [Buridan]

19. Language / D. Propositions / 3. Concrete Propositions

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Propositions (such as 'that dog is barking') only exist if their items exist [Williamson]