Combining Texts

All the ideas for 'Through the Looking Glass', 'Letters to Regius' and 'On the Syllogism IV'

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5 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]

7. Existence / A. Nature of Existence / 3. Being / e. Being and nothing

21982

I only wish I had such eyes as to see Nobody! It's as much as I can do to see real people. [Carroll,L]

9. Objects / D. Essence of Objects / 15. Against Essentialism

12251

Substantial forms are not understood, and explain nothing [Descartes]

29. Religion / B. Monotheistic Religion / 4. Christianity / c. Angels

16772

An angelic mind would not experience pain, even when connected to a human body [Descartes, by Pasnau]