What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_8, if x_8 were a politician, then x_8 is rich. For all x_8, if x_8 were rich, then x_8 is a politician. For all x_8, if x_8 were rich, then x_8 is a politician.
For all x_8, x_8 is a politician if and only if x_8 is rich. For all x_8, x_8 is a politician if and only if x_8 is rich. For all x_8, x_8 is rich if and only if x_8 is a politician. For all x_8, x_8 is rich if and only if x_8 is a politician.