Who can remember every centerfold in Playboy?
That is a better memory than pool balls.
FWIW, the average brain can store 13.3 years of HDTV video and has the ability to store 20,000,000 four drawer cabinets of text.
And how do I know that?
Because I remember the date when I read it (over five years ago), the source, and the information contained in the article.
January 20, 2016 in the UK Daily Mail.
https://www.dailymail.co.uk/science...S-memories-previously-thought-says-study.html
I went to a week-long memory course many years ago when I was in the Air Force. It was a "strange" course, where we sat in a dark room and all kinds of sounds were played and we watched flashing lights and video images projected around the room. It was kind of a psychedelic atmosphere. The objective was to make you aware of certain sounds, images, and things occurring around you, so that you could attach "tags" to things and later remember them. I have remembered hundreds and hundreds of complex "things" for decades and decades.
Your brain can store all kinds of information and it stays in your brain until it is "overwritten", like computer files. The information in your brain becomes "scattered" over time and you sometimes only remember small segments of the overall memory. It is like when a disk drive becomes fragmented or certain portions of the information becomes "corrupted".
Memories have "tags" and you can sometimes search your brain by running certain "tags through your mind until you find what you are looking for. If you can't remember the "tags", it makes retrieving the information more difficult because there is no "wild card" tag.
There are certain things that may stay in the mind forever and never be remembered, at least not by trying to retrieve them. These are usually things that your mind tries to repress because they something that was not pleasant...i.e., being abused as a child, etc.
The brain is a very sophisticated machine. It's too bad that a lot of people don't use them more often.