I think by information they mean more concrete things. For instance, imagine a bird landing on a branch. If someone is around to see it, they know that if happe

I think by information they mean more concrete things. For instance, imagine a bird landing on a branch. If someone is around to see it, they know that if happened. If no one is around though, once the bird flies away and the branch stops shaking, the information that a bird had landed on the branch is gone.