For a proposed moral system to have moral force among moral agents whom fall under its jurisdiction, those moral agents must be privy to the moral facts for which they will be judged. To judge immoral and punish moral agents who have no access to the moral fact for which they are being punished would make the judge/punisher irrational/unjust. A moral agent can not be morally culpable for moral facts unknown to that moral agent. This allows moral systems to be tested for coherency. If any moral system introduces moral facts that are not epistemically accessible to those who are judged on their compliance to those inaccessible moral facts, that moral system is incoherent, and can be dismissed with full prejudice. A practical test would be to survey a healthy sample of the alleged moral agents, and test either a) the degree to which their judgements on moral scenarios map to the explicit moral facts of the moral system, or b) the degree to which their judgements on moral scenarios converge on consensus.
P1: If the moral agents under any proposed moral system do not have access to the moral fact against which they will be judged/punished, that moral system is incoherent.
P2: Moral facts within the Biblical system of morality are demonstrably unknown to the moral agents who will allegedly be judged/punished against those moral facts.
C1: The Biblical system of morality is incoherent.
Rigorous arguments to the contrary are welcomed.