Combining Texts

All the ideas for 'In Praed.', 'De Essentia' and 'On the Syllogism IV'

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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 / A. Existence of Objects / 5. Individuation / d. Individuation by haecceity

13132

A snowball's haecceity is the property of being identical with itself [Plantinga, by Westerhoff]

9. Objects / B. Unity of Objects / 2. Substance / a. Substance

16776

Substance is an intrinsic thing, so parts of substances can't also be intrinsic things [Duns Scotus]