What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall x_6: P_4(x_6) <-> W_1(x_6). forall x_6: ~P_6(x_6) or W_1(x_6). exists x_6: P_6(x_6) or R(x_6). forall x_6: R(x_6) -> P_4(x_6).
exists x_6: R(x_6) or W_1(x_6). forall x_6: P_4(x_6) -> W_1(x_6). forall x_6: W_1(x_6) -> P_4(x_6).