What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? It is cloudy. If Charles were a politician, then Linda is playing tennis. If Linda plays tennis, then Robert is playing a game. If Charles listens to a song, then Charles is a politician. Charles is listening to a song.
Charles is a politician. If Charles were a politician, then Robert is playing a game. If Charles listens to a song, then Linda is playing tennis. It is cloudy and Charles is listening to a song. Charles is listening to a song and it is cloudy.