How does a pensive work?
Straight from Jo, via the Leaky/Mugglenet joint interview (July 2005): A Pensieve recreates a moment for you, so you could go into your own memory and relive things that you didn’t notice the time. It’s somewhere in your head, which I’m sure it is, in all of our brains. I’m sure if you could access it, things that you don’t know you remember are all in there somewhere.