What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? ~q_13. p -> q_13. forall x_11: R_11(x_11) <-> S_11(x_11). ~S_11(a_11).
~p. ~q_13 and ~S_11(a_11). ~S_11(a_11) and ~q_13. forall x_11: R_11(x_11) -> S_11(x_11). forall x_11: S_11(x_11) -> R_11(x_11).