What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_17, x_17 is a bartender or x_17 will play squash. For all x_17, x_17 is a bartender if and only if x_17 will sleep. There is at least one x_17 for which x_17 will not sleep.
For all x_17, if x_17 were a bartender, then x_17 is sleeping. For all x_17, if x_17 sleeps, then x_17 is a bartender. There is at least one x_17 for which x_17 is not a bartender.