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 z for which if z were a nurse, then z is drinking water. For all z, z is not a bartender. For all z, if z drinks water, then z is a bartender. For all z, if z were a bartender, then z is a nurse.
For all z, z will not drink water. For all z, if z drinks water, then z is a nurse. There is at least one z for which if z were a nurse, then z is a bartender. There is at least one z for which if z were a bartender, then z is drinking water.