inconsistency
    /ˌɪnkənˈsɪstənsi/ 
    
 
    
    noun
    
    plural -cies
    
    the quality or fact of being inconsistent: such as
    
    [noncount] :the quality or fact of not staying the same at different times
    
    
    
    
    
    
    
    the quality or fact of having parts that disagree with each other [noncount]
    
    
    
    
    
    [count] :a difference or disagreement between two statements which means that both cannot be true