Charlie is green. Charlie is not kind. Charlie is rough. Charlie is not round. Dave is not green. Dave is kind. Dave is quiet. Dave is not rough. Dave is round. Dave is white. Dave is not young. Fiona is kind. Fiona is quiet. Fiona is rough. Fiona is white. If Charlie is rough then Charlie is not white. If Fiona is young then Fiona is green. All young, kind things are rough.
Dave is white.