What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_13, x_13 will work or x_13 is a server. For all x_13, if x_13 works, then x_13 is a police officer. There is at least one x_13 for which x_13 will sleep and x_13 is sad. For all x_13, if x_13 were a server, then x_13 is a police officer.
There is at least one x_13 for which x_13 will sleep. There is at least one x_13 for which x_13 is sad. For all x_13, x_13 is a police officer.