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, x_8 is a politician if and only if x_8 is a bartender. For all x_8, x_8 is a writer if and only if x_8 is a lawyer. For all x_8, x_8 is not a bartender. For all x_8, x_8 is a politician if and only if x_8 is a lawyer.
For all x_8, if x_8 were a politician, then x_8 is a bartender. For all x_8, if x_8 were a writer, then x_8 is a lawyer. For all x_8, if x_8 were a politician, then x_8 is a lawyer. For all x_8, if x_8 were a bartender, then x_8 is a politician. For all x_8, if x_8 were a lawyer, then x_8 is a writer. For all x_8, if x_8 were a lawyer, then x_8 is a politician. For all x_8, x_8 is not a politician.