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