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"A propositional logic with 4 values: true, false, divergent and meaningless."
Jan A. Bergstra, Inge Bethke, Piet Rodenburg (1995)
- Jan A. Bergstra, Inge Bethke, Piet Rodenburg:
A propositional logic with 4 values: true, false, divergent and meaningless. J. Appl. Non Class. Logics 5(2): 199-217 (1995)
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