   The DRR is a negative constraint; it identifies a kind of reason that cannot itself justify a coercive law and so a kind of reason on which citizens may not exclusively rely when supporting a coercive law. But this negative constraint is typically conjoined with a permission: although citizens may not support coercive laws for which they believe themselves to have only a religious rationale, they may support coercive laws for which they believe there is only a plausible secular rationale. As we'll see in a moment, advocates of the DRR furnish reasons to believe that religious and secular reasons have this asymmetrical justificatory role.