What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_3, x_3 is a janitor or x_3 is rich. There is at least one x_3 for which if x_3 were a janitor, then x_3 is not sleeping. For all x_3, x_3 will sleep.
There is at least one x_3 for which x_3 is not a janitor.