Dave is big. Dave is green. Dave is kind. Dave is quiet. Dave is rough. Dave is not round. Fiona is kind. Fiona is rough. Fiona is white. Gary is big. Gary is rough. Gary is round. Gary is not white. Harry is kind. Harry is not rough. All rough, green things are kind. Green, white things are round. All quiet things are green. Rough things are quiet. If Harry is white and Harry is kind then Harry is not round. If Harry is green and Harry is round then Harry is rough. If something is kind and not rough then it is not round. If Fiona is quiet and Fiona is not green then Fiona is not white.
Harry is not quiet.