Erin is strong. Erin is high. Fiona is thin. Fiona is small. Alan is clever. Dave is bad. Dave is rough. If someone is not big then they are bad. If someone is not dull then they are kind. If someone is clever then they are smart. If someone is smart and not poor then they are quiet. If someone is bad and not big then they are sad. All sad people are short. If someone is thin and small then they are poor. If someone is poor and not smart then they are rough. If someone is rough then they are young. If someone is kind then they are wealthy. All wealthy people are nice. All quiet people are old. 
Erin is short.