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