I have a similar question: can things exist if they have no physical connection at all to their surroundings? The double slit experiment shows that light seem to be information (if we pretend waves are information) until its forced (by observing) to exist. This works with photons, electrons, neutrons, atoms and even particles. So what if i take a cup and put it in a “magic box” that disconnects it from every “observing” system? Does it vanish? Is it gas if i open that box again?