Valuational semantics of rule derivability |
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Authors: | Lloyd Humberstone |
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Institution: | (1) Department of Philosophy, Monash University, Wellington Road, 3168 Clayton, Victoria, Australia |
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Abstract: | If a certain semantic relation (which we call local consequence ) is allowed to guide expectations about which rules are derivable from other rules, these expectations will not always be fulfilled, as we illustrate. An alternative semantic criterion (based on a relation we call global consequence ), suggested by work of J.W. Garson, turns out to provide a much better — indeed a perfectly accurate — guide to derivability. |
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Keywords: | rules consequence relations |
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