What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_9, x_9 will drink water if and only if x_9 will sleep. For all x_9, x_9 is a police officer. There is at least one x_9 for which if x_9 sleeps, then x_9 is a server. For all x_9, if x_9 drinks water, then x_9 is not a police officer. For all x_9, if x_9 were a server, then x_9 is sleeping.
For all x_9, x_9 will not drink water. There is at least one x_9 for which x_9 will sleep if and only if x_9 is a server. There is at least one x_9 for which x_9 is a server if and only if x_9 will sleep. For all x_9, if x_9 drinks water, then x_9 is sleeping. For all x_9, if x_9 sleeps, then x_9 is drinking water.