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