What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? There is at least one x_4 for which x_4 will work or x_4 will read a book. For all x_4, x_4 is rich. For all x_4, if x_4 works, then x_4 is not rich.
For all x_4, x_4 will not work.