 ##  [Validity](/index.php/validity) 

  ##  [Validity](https://mathlogic.quantumdictionary.io/validity-0) 

  
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- Natural &amp; Formal Sciences -

**Mathematics &amp; Logic Dictionary**

 
Definition

Property of a sentence (formula closed under free variables) that it is true under every admissible interpretation or valuation in the logic; a sentence that holds in all models is valid (a logical truth).