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