Bob is nice. Dave is not quiet. If something is cold then it is not round. If Dave is rough and Dave is cold then Dave is young. If Dave is not cold and Dave is not kind then Dave is rough. If something is kind then it is not young. If something is nice then it is not kind. If Dave is rough then Dave is not kind. If Dave is cold and Dave is nice then Dave is round. If something is young and not round then it is quiet.
Bob is quiet.