What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? If Barbara were a soldier, then Linda is a mechanic. It is overcast if and only if Karen is drinking water. Karen is not drinking water. Barbara is a soldier.
Linda is a mechanic. Karen is not drinking water and Barbara is a soldier. Barbara is a soldier and Karen is not drinking water. If it is overcast, then Karen is drinking water. If Karen drinks water, then it is overcast. It is not overcast.