Combining Texts

All the ideas for 'Set Theory and related topics (2nd ed)', 'Aristotle on Essence and Explanation' and 'Boole calculus and the Concept script'

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7 ideas

4. Formal Logic / F. Set Theory ST / 3. Types of Set / e. Equivalence classes
8920 Equivalence relations are reflexive, symmetric and transitive, and classify similar objects [Lipschutz]
9. Objects / D. Essence of Objects / 7. Essence and Necessity / b. Essence not necessities
11993 Jones may cease to exist without some simple property, but that doesn't make it essential [Kung]
9. Objects / D. Essence of Objects / 7. Essence and Necessity / c. Essentials are necessary
11997 A property may belong essentially to one thing and contingently to another [Kung]
9. Objects / D. Essence of Objects / 8. Essence as Explanatory
11992 Aristotelian essences underlie a thing's existence, explain it, and must belong to it [Kung]
14. Science / D. Explanation / 2. Types of Explanation / k. Explanations by essence
11995 Some peripheral properties are explained by essential ones, but don't themselves explain properties [Kung]
11996 Some non-essential properties may explain more than essential-but-peripheral ones do [Kung]
18. Thought / A. Modes of Thought / 6. Judgement / a. Nature of Judgement
18265 We don't judge by combining subject and concept; we get a concept by splitting up a judgement [Frege]