What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? Michael is not a scientist. If John were a server, then Susan is a police officer. If Susan were a police officer, then it is raining. If it rains, then John is a server. John is a server if and only if Michael is a scientist.
If John were a server, then it is raining. If Susan were a police officer, then John is a server. If it rains, then Susan is a police officer. If John were a server, then Michael is a scientist. If Michael were a scientist, then John is a server. John is not a server.