Dave is kind. Dave is white. Dave is young. Fiona is quiet. Fiona is rough. Fiona is smart. Fiona is white. Fiona is young. Gary is kind. Harry is kind. Harry is quiet. White things are big. If Harry is quiet then Harry is rough. All big things are smart. If something is young and kind then it is rough. All kind things are white. All quiet, rough things are young. All smart things are rough. If something is big and rough then it is young.
Dave is not big.