What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall x_7: P_7(x_7) or ~P(x_7). forall x_7: P(x_7) or P_4(x_7). exists x_7: P_4(x_7) <-> P_7(x_7).
forall x_7: P(x_7) -> P_7(x_7). exists x_7: P_4(x_7) -> P_7(x_7). exists x_7: P_7(x_7) -> P_4(x_7).