Dave is big. Dave is high. Fiona is thin. Fiona is little. Harry is kind. Anne is poor. Anne is sad. If someone is not huge then they are poor. If someone is not bad then they are nice. If someone is kind then they are wealthy. If someone is wealthy and not dull then they are quiet. If someone is poor and not huge then they are rough. If someone is thin and little then they are dull. If someone is dull and not wealthy then they are sad. All nice people are smart. 
Fiona is not sad.