Alan is high. Alan is big. Bob is short. Bob is little. Dave is wealthy. Anne is dull. Anne is rough. If someone is not strong then they are dull. If someone is not poor then they are clever. If someone is wealthy then they are nice. If someone is nice and not sad then they are kind. If someone is dull and not strong then they are bad. All bad people are thin. If someone is short and little then they are sad. If someone is sad and not nice then they are rough. If someone is rough then they are young. If someone is clever then they are smart. All smart people are quiet. All kind people are experienced. 
Alan is not thin.