Ah, ghosts, interesting one. Well, there's some great theories about ghosts. I'm prepared to believe in ghosts, I've got no reason not to.

For example there's some theories that there's a lot of iron content in bricks in houses, where they think there's a possibility where you can effectively have a holographic recording of a person, which in certain circumstances can be projected. i.e. you effectively get this wispy, ghosty character.

And arguably, what is time, and life and just because they're a recording doesn't mean they don't have some sort of context and life about them, maybe.