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COMMON CONFUSION AMONG SIMILAR TERMS

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What are the differences between/among :

  1. Validity, Satisfiability and Tautology

  2. Fallacy and Contradiction

1 Answer

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Valid = Always true = Tautology = 1
Contradiction = Always False = Fallacy = 0
Contingency = Sometimes true and sometimes False
Satisfiable = Sometimes true = Tautology + Contingency
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