If you were designing the sort of information-processing system a brain is, it would be extremely impractical to store memories permanently in their original form. You need mechanisms for transforming and recording them; for chunking information into categories . Is your memory a phonograph record on which the information is stored in localized grooves to be replayed on demand? Is so, it's a very bizarre record, for the songs are different every time they're played. Human memory is more like the village storyteller; it doesn't passively store facts but weaves them into a good (coherent, plausible) story, which is recreated with each telling.