What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_7, x_7 will read a book or x_7 is not a cashier. There is at least one x_7 for which x_7 is a cashier or x_7 will not read a book.
For all x_7, if x_7 were a cashier, then x_7 is reading a book. There is at least one x_7 for which if x_7 reads a book, then x_7 is a cashier.