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