One thing here that I disagree with is that there is a major difference between things that you know cold and things that you need to refer to external memory t

One thing here that I disagree with is that there is a major difference between things that you know cold and things that you need to refer to external memory to refresh your recollection. Studying something closely and repetitiously enough to know it by heart makes the knowledge more useful. It also provides you with a sort of navigational buoy or pylon that acts as a referent for other important pieces of knowledge. Mass media (electronic media in particular) tends to encourage the user to seek many shallow impressions that do not always leave deep and permanent marks. So, any single impression doesn't leave a big mark or define your character. But deeper study into a single topic or work does have a profound effect on who you are.