Alan is big. Alan is high. Gary is tiny. Gary is small. Anne is nice. Fiona is rough. Fiona is bad. If someone is not huge then they are rough. If someone is not sad then they are smart. If someone is nice then they are kind. If someone is kind and not dull then they are clever. If someone is rough and not huge then they are poor. All poor people are short. If someone is tiny and small then they are dull. If someone is dull and not kind then they are bad. If someone is bad then they are young. If someone is smart then they are wealthy. All wealthy people are quiet. All clever people are experienced. 
Alan is not short.