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 is an electrician if and only if x will drive a car. For all x, x will read a book if and only if x will drive a car. There is at least one x for which x will not drink water. For all x, x is an electrician if and only if x will drink water.
For all x, if x were an electrician, then x is driving a car. For all x, if x reads a book, then x is driving a car. For all x, if x were an electrician, then x is drinking water. For all x, if x drives a car, then x is an electrician. For all x, if x drives a car, then x is reading a book. For all x, if x drinks water, then x is an electrician. There is at least one x for which x is not an electrician.