Anne is cold. Anne is nice. Anne is quiet. Anne is not white. Anne is young. Dave is cold. Dave is not rough. Dave is white. Fiona is cold. Fiona is not quiet. Fiona is not red. Fiona is white. Rough things are white. If Fiona is cold then Fiona is rough. Nice things are not red. If something is nice and not quiet then it is not rough. If Dave is quiet then Dave is cold. If Fiona is cold and Fiona is young then Fiona is not quiet. If something is not rough and not quiet then it is nice. If something is not red and not white then it is nice.
Dave is quiet.