Logicandapplications2023/class_06_17082023/summary.txt

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Semantics of propositional logic
Valuation
Satisfiability
unѕatisfiable
validity
contradiction
tautology
logical implication
logical equivalence
claim : \alpha logically implies \beta Iff (\alpha \implies \beta) is a tautology.
claim : If \alpha is a contradiction then for any \beta, \alpha logically implies \beta.