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