[hypertele-Xii]

Memory is subconscious.

You may recall things without consciously thinking about them, and you may fail to recall things when specifically thinking about them. Conscious thinking is good at logically synthesizing information as it's needed, but some property of it forbids it from actually storing any information. Real world data just doesn't organize neatly; The subconscious is fine being a mess.

Try this experiment: Ask your subconscious to recall a specific memory you know you have. Then, stop thinking about it entirely. Within an unspecified length of time (could be minutes, hours, days), you'll spontaneously recall details about that memory you didn't know you had.