 Intuitively this principle just says that the same action cannot be both obligatory and forbidden. Note that as initially described, the existence of dilemmas does not conflict with PC. For as described, dilemmas involve a situation in which an agent ought to do \(A\), ought to do \(B\), but cannot do both \(A\) and \(B\). But if we add a principle of deontic logic, then we obtain a conflict with PC: