I found this article:
http://allpsych.com/psychology101/memory/
Exceptionally thought provoking, I think!)
There's been quite a bit of ongoing research into the memory/forgetfulness phenomena linking the process to some aspects of how computer memory functions.
If one thinks about it, there a zillions (well… a lot) of things we see, hear, taste, etc., every day that, apparently, don't make it past the sensory memory function described in the article. To have all of that information implanted in long term memory would soon overwhelm most of us. But… perhaps some of that vast amount of sensory intake
does[i make into at least short term memory causing a [i]glitch] (I forget the correct medical term…) and the result is forgetting, at least for the moment.