What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_12, x_12 is a politician if and only if x_12 is a server. Elisabeth is a politician if and only if Elisabeth is a server.
If Elisabeth were a politician, then Elisabeth is a server. If Elisabeth were a server, then Elisabeth is a politician. For all x_12, if x_12 were a politician, then x_12 is a server. For all x_12, if x_12 were a server, then x_12 is a politician.