 ##  [Principle of Contraposition](/principle-contraposition) 

  ##  [Principle of Contraposition](https://mathlogic.quantumdictionary.io/principle-contraposition-0) 

  
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- Natural &amp; Formal Sciences -

**Mathematics &amp; Logic Dictionary**

 
Definition

The logical equivalence or valid inference connecting an implication A → B with its contrapositive ¬B → ¬A, used to transform or justify arguments by negating and reversing antecedent and consequent.