##  [Proof by Contradiction](/index.php/proof-contradiction) 

  ##  [Proof by Contradiction](https://natural.quantumdictionary.io/proof-contradiction-0) 

  

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**Natural & Formal Sciences Dictionary**

 







 

 

 

 



 

 

 

 

Definition

A method of proof that assumes the negation of the target statement and derives a logical contradiction; from the contradiction one concludes the original statement (classically using the law of excluded middle or double-negation elimination).