What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall x_13: P_13(x_13) -> R_6(x_13). R_6(a_5) -> T(a_5). forall x_13: P_13(x_13) <-> T(x_13).
forall x_13: P_13(x_13) -> T(x_13). forall x_13: T(x_13) -> P_13(x_13).