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The Undecidability of Entailment and Relevant Implication

Alasdair Urquhart
The Journal of Symbolic Logic
Vol. 49, No. 4 (Dec., 1984), pp. 1059-1073
DOI: 10.2307/2274261
Stable URL: http://www.jstor.org/stable/2274261
Page Count: 15
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The Undecidability of Entailment and Relevant Implication
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