What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? Elisabeth is not a police officer. For all x_7, x_7 is a police officer if and only if x_7 will drink water. Elisabeth is drinking water or Charles is playing squash.
For all x_7, if x_7 were a police officer, then x_7 is drinking water. For all x_7, if x_7 drinks water, then x_7 is a police officer.