DuckCorp Dico

Found one definition

1.                 From en.wikipedia.org:
                   
   
   
                   
                     
   NEGATIVE RESULT may refer to:
   
    - Proof of impossibility , a proof that a particular problem cannot be solved
    - Null result , a result which shows no evidence of the intended effect
    - Null hypothesis , a hypothesis that there is no relationship between two measured phenomena
   [disambiguation]