What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall x_15: P_15(x_15) -> P(x_15). forall x_15: P(x_15) -> P_4(x_15). exists x_15: P_4(x_15) <-> W_4(x_15). forall x_15: P_15(x_15) or ~W_4(x_15).
forall x_15: P_15(x_15) -> P_4(x_15). forall x_15: W_4(x_15) -> P_15(x_15). exists x_15: P_4(x_15) -> W_4(x_15). exists x_15: W_4(x_15) -> P_4(x_15).