""Take an atom here, and atom on Jupiter, and an atom on Alpha Centauri, and call this composite "X". Does X really exist? As defined, yes. But it's an arbitrary abstract construction. Presumably we want instead to "carve Nature at the joints". (Actually, there is indeed a sense in which the entire multiverse is a single entangled object)""
https://en.wikipedia.org/wiki/Universal_wavefunction