The relationship between facts and opinions is thus one of mutual entailment: if opinions were not based on correct information and the free access to all relevant facts they could scarcely claim any validity. And if they were to be based on fantasy, self-deception, or deliberate falsehood, then no possibility of genuine debate and argumentation could be sustained. Both factual truth and the general habit of truth-telling are therefore basic to the formation of sound opinions and to the flourish