certainty : Idioms & Phrases
Moral certainty
- 
       noun certainty based on an inner conviction
        
      
- she believed in the importance of moral absolutes and moral certainty
 - the prosecutor had a moral certainty that the prisoner was guilty
 
 
WordNet
- a very high degree or probability, although not demonstrable as a certainty; a probability of so high a degree that it can be confidently acted upon in the affairs of life; 
as, there is a .moral certainty of his guilt 
Webster 1913
Of a certainty
- certainly.