What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall x_13: R_4(x_13) -> T_1(x_13). forall x_13: ~Q_9(x_13). forall x_13: T_1(x_13) -> R_4(x_13). forall x_13: P_1(x_13) -> Q_9(x_13). exists x_13: T_1(x_13) -> P_1(x_13).
forall x_13: ~P_1(x_13). exists x_13: T_1(x_13) -> Q_9(x_13). exists x_13: R_4(x_13) -> P_1(x_13). forall x_13: R_4(x_13) <-> T_1(x_13). forall x_13: T_1(x_13) <-> R_4(x_13).