Marlow Human memory is so powerful, yet we still have to write things down to remember them - addresses, phone numbers, names, lyrics, words. Despite having zettabytes of memory in our brains, we still can't write something like a number to the database. Our memory is basically all RAM. Ask someone to repeat "53467402" and they could probably do it. Ask them 5 minutes later what the line was and it's gone. It's all RAM.