What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x, x will sleep if and only if x is a doctor. William is sleeping. For all x, if x were a doctor, then x is sleeping.
There is at least one x for which x will sleep. For all x, if x sleeps, then x is a doctor. For all x, if x were a doctor, then x is sleeping.