What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall x_15: Q_15(x_15) -> W(x_15). forall x_15: W(x_15) -> P_3(x_15). exists x_15: W(x_15) <-> P_15(x_15). forall x_15: P_15(x_15).
forall x_15: Q_15(x_15) -> P_3(x_15). exists x_15: W(x_15) -> P_15(x_15). exists x_15: P_15(x_15) -> W(x_15).