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'', 'Summula philosophiae naturalis' and 'Philosophical Logic'
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5 ideas
5. Theory of Logic / E. Structures of Logic / 2. Logical Connectives / a. Logical connectives
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Standardly 'and' and 'but' are held to have the same sense by having the same truth table [Rumfitt]
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Formalising arguments favours lots of connectives; proving things favours having very few [Burgess]
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The sense of a connective comes from primitively obvious rules of inference [Rumfitt]
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5. Theory of Logic / E. Structures of Logic / 2. Logical Connectives / e. or
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Asserting a disjunction from one disjunct seems odd, but can be sensible, and needed in maths [Burgess]
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5. Theory of Logic / E. Structures of Logic / 4. Variables in Logic
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All occurrences of variables in atomic formulas are free [Burgess]
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