Alan is high. Alan is big. Fiona is short. Fiona is small. Bob is kind. Gary is poor. Gary 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 short and small then they are dull. If someone is dull and not wealthy then they are sad. All nice people are smart. 
Gary is not smart.