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