What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall x_8: Q_1(x_8). forall x_8: P_8(x_8). forall x_8: P_8(x_8) <-> S_2(x_8).
forall x_8: Q_1(x_8) and P_8(x_8). forall x_8: P_8(x_8) and Q_1(x_8). forall x_8: P_8(x_8) -> S_2(x_8). forall x_8: S_2(x_8) -> P_8(x_8).