What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall x_19: R_19(x_19) <-> R_4(x_19). forall x_19: Q_19(x_19) -> R_4(x_19). forall x_19: P_19(x_19) or Q_19(x_19). forall x_19: Q_15(x_19) -> R_1(x_19). forall x_19: ~P_19(x_19) or R_19(x_19). forall x_19: P_15(x_19) or Q_15(x_19). exists x_19: P_15(x_19) -> R_1(x_19).
forall x_19: Q_19(x_19) or R_19(x_19). exists x_19: R_1(x_19). forall x_19: R_19(x_19) -> R_4(x_19). forall x_19: R_4(x_19) -> R_19(x_19).