What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_3, if x_3 were a cashier, then x_3 is playing squash. For all x_3, x_3 is a cashier or x_3 will not play squash. There is at least one x_3 for which x_3 will not play squash.
There is at least one x_3 for which x_3 is not a cashier. For all x_3, if x_3 plays squash, then x_3 is a cashier.