What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_9, x_9 is a politician if and only if x_9 will cook. Sarah is rich or Joseph is cooking. If Sarah were rich, then Joseph is a politician.
If Joseph were a janitor, then Sarah is rich. For all x_9, if x_9 were a politician, then x_9 is cooking. For all x_9, if x_9 cooks, then x_9 is a politician.