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_6 for which if x_6 were a cashier, then x_6 is drinking water. For all x_6, x_6 will not read a book or x_6 is a cashier. For all x_6, x_6 will drink water if and only if x_6 will work. For all x_6, x_6 will read a book or x_6 will work.
For all x_6, x_6 will work or x_6 is a cashier. For all x_6, if x_6 drinks water, then x_6 is working. For all x_6, if x_6 works, then x_6 is drinking water.