Many-Valued Approaches to Temporal Logic
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All the tense logics we have dealt with so far have been two-valued in a fairly definite sense, that is, they are all based on the classical propositional calculus. In terms of model theory, this is reflected in the way we evaluate the propositional connectives ∼, ⊃, v, ≡ in tense structures — the truth-values of complex formulas built with these connectives are calculated at each moment in a tense-structure according to the classical, two-valued prescription.
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