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'works', 'The Causal Theory of Names' and 'The Principles of Mathematics'
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5 ideas
5. Theory of Logic / E. Structures of Logic / 1. Logical Form
4730
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For Aristotle, the subject-predicate structure of Greek reflected a substance-accident structure of reality [Aristotle, by O'Grady]
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5. Theory of Logic / E. Structures of Logic / 2. Logical Connectives / b. Basic connectives
14105
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There seem to be eight or nine logical constants [Russell]
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5. Theory of Logic / E. Structures of Logic / 2. Logical Connectives / c. not
18722
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Negations are not just reversals of truth-value, since that can happen without negation [Wittgenstein on Russell]
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5. Theory of Logic / E. Structures of Logic / 3. Constants in Logic
14104
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Constants are absolutely definite and unambiguous [Russell]
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5. Theory of Logic / E. Structures of Logic / 4. Variables in Logic
14114
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Variables don't stand alone, but exist as parts of propositional functions [Russell]
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