Combining Texts

All the ideas for 'On the Syllogism IV', 'Letters to De Vries' and 'Commentary on the Sentences'

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4 ideas

5. Theory of Logic / E. Structures of Logic / 6. Relations in Logic

17744

De Morgan started the study of relations and their properties [De Morgan, by Walicki]

13501

De Morgan found inferences involving relations, which eluded Aristotle's syllogistic [De Morgan, by Hart,WD]

9. Objects / D. Essence of Objects / 12. Essential Parts

16792

If parts change, the whole changes [William of Ockham]

9. Objects / D. Essence of Objects / 14. Knowledge of Essences

4869	Experience does not teach us any essences of things [Spinoza]