What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall x_12: W(x_12) -> Q_12(x_12). u. ~W(a_11). forall x_12: Q_12(x_12) -> W(x_12).
u and ~W(a_11). ~W(a_11) and u. forall x_12: W(x_12) <-> Q_12(x_12). forall x_12: Q_12(x_12) <-> W(x_12).