Charlie is furry. Charlie is quiet. Charlie is not rough. Charlie is white. Dave is blue. Dave is green. Dave is quiet. Dave is round. Dave is white. Gary is rough. Gary is round. Gary is not white. If Dave is round and Dave is not furry then Dave is green. If something is white and not furry then it is quiet. If Charlie is round and Charlie is rough then Charlie is blue. Rough things are not green. All white things are quiet. If something is white then it is green. If Gary is furry and Gary is not white then Gary is round. If something is blue and not green then it is not round.
Charlie is blue.