The Living Force
ark said:THE ETHICS OF BELIEF (1879), W. K. Clifford
They would not be innocent, they would only be not found out. Every one of them, if he chose to examine himself in foro conscientiae [Before the tribunal of conscience], would know that he had acquired and nourished a belief, when he had no right to believe on such evidence as was before him; and therein he would know that he had done a wrong thing.
So many people (most people?) will go to their deaths firmly believing something that is wrong or incorrect. It's scary really.