Combining Texts

All the ideas for 'Changes in Events and Changes in Things', 'Grundgesetze der Arithmetik 1 (Basic Laws)' and 'Is There a Marxist Doctrine?'

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15 ideas

3. Truth / A. Truth Problems / 3. Value of Truth
Most people won't question an idea's truth if they depend on it [Weil]
5. Theory of Logic / F. Referring in Logic / 2. Descriptions / b. Definite descriptions
Frege considered definite descriptions to be genuine singular terms [Frege, by Fitting/Mendelsohn]
5. Theory of Logic / G. Quantification / 4. Substitutional Quantification
Contradiction arises from Frege's substitutional account of second-order quantification [Dummett on Frege]
6. Mathematics / A. Nature of Mathematics / 3. Nature of Numbers / g. Real numbers
Real numbers are ratios of quantities, such as lengths or masses [Frege]
6. Mathematics / B. Foundations for Mathematics / 1. Foundations for Mathematics
We can't prove everything, but we can spell out the unproved, so that foundations are clear [Frege]
6. Mathematics / B. Foundations for Mathematics / 5. Definitions of Number / c. Fregean numbers
Frege defined number in terms of extensions of concepts, but needed Basic Law V to explain extensions [Frege, by Hale/Wright]
Frege ignored Cantor's warning that a cardinal set is not just a concept-extension [Tait on Frege]
6. Mathematics / C. Sources of Mathematics / 6. Logicism / a. Early logicism
My Basic Law V is a law of pure logic [Frege]
7. Existence / D. Theories of Reality / 8. Facts / b. Types of fact
That Queen Anne is dead is a 'general fact', not a fact about Queen Anne [Prior,AN]
18. Thought / D. Concepts / 3. Ontology of Concepts / c. Fregean concepts
A concept is a function mapping objects onto truth-values, if they fall under the concept [Frege, by Dummett]
Frege took the study of concepts to be part of logic [Frege, by Shapiro]
20. Action / B. Preliminaries of Action / 2. Willed Action / d. Weakness of will
Weakness of will is the inadequacy of the original impetus to carry through the action [Weil]
22. Metaethics / A. Ethics Foundations / 2. Source of Ethics / j. Ethics by convention
In a violent moral disagreement, it can't be that both sides are just following social morality [Weil]
25. Social Practice / E. Policies / 1. War / b. Justice in war
When war was a profession, customary morality justified any act of war [Weil]
27. Natural Reality / D. Time / 2. Passage of Time / e. Tensed (A) series
'Thank goodness that's over' is not like 'thank goodness that happened on Friday' [Prior,AN]