I believed that the intelligence of person is not affected by the age. There are many intelligent children than adults. But in many case, adult become more intellectual than younger ones because of their experiences in life. The older you are, the more experiences you had. As we know, that experienced is the best teacher. So, it is normal that the old people will tell us that we need to learn more in life and they are right. And it also depends on the field of the discussions. If the topic were all about the past generations, of course the oldies knew much about those things. But if the topic is about the latest trends , the new generation knew about it. So, we can't compare the age in terms of intellectualism because people experienced differently from others year by year.