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'', 'The Fragmentation of Value' and 'works'
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5 ideas
5. Theory of Logic / E. Structures of Logic / 2. Logical Connectives / a. Logical connectives
11210
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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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11065
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The inferential role of a logical constant constitutes its meaning [Gentzen, by Hanna]
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11023
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The logical connectives are 'defined' by their introduction rules [Gentzen]
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11213
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Each logical symbol has an 'introduction' rule to define it, and hence an 'elimination' rule [Gentzen]
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11212
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The sense of a connective comes from primitively obvious rules of inference [Rumfitt]
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