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