What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_18, x_18 will work or x_18 is an electrician. For all x_18, if x_18 sleeps, then x_18 is working. For all x_18, if x_18 were an electrician, then x_18 is sleeping. For all x_18, if x_18 reads a book, then x_18 is a nurse. For all x_18, if x_18 works, then x_18 is sleeping. For all x_18, x_18 will drive a car or x_18 will read a book. There is at least one x_18 for which if x_18 drives a car, then x_18 is a nurse.
For all x_18, if x_18 were an electrician, then x_18 is working. For all x_18, x_18 will sleep. There is at least one x_18 for which x_18 is a nurse. For all x_18, x_18 will sleep if and only if x_18 will work. For all x_18, x_18 will work if and only if x_18 will sleep.