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