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_2(x_7). forall x_7: ~P_5(x_7). forall x_7: P_2(x_7) -> P_5(x_7). forall x_7: ~P_7(x_7) or R_7(x_7). forall x_7: P_5(x_7) -> P_2(x_7).
forall x_7: ~P_2(x_7). forall x_7: P_2(x_7) or R_7(x_7). forall x_7: P_2(x_7) <-> P_5(x_7). forall x_7: P_5(x_7) <-> P_2(x_7).