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