What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? If James plays a game, then William is drinking water. If William drinks water, then it is overcast. James is playing a game or it is cloudy. If it is cloudy, then William is drinking water. If it is overcast, then William is drinking water. Karen is rich.
If James plays a game, then it is overcast. If it is cloudy, then it is overcast. William is drinking water. William is drinking water if and only if it is overcast. It is overcast if and only if William is drinking water.