Jack claims that Pluto has five moons: Charon, Nix, and Hydra, Kerberos, and Styx. Jill disagrees with Jack’s claim, insisting that Nix, Hydra, Kerberos, and Styx are actually moons of both Pluto and Charon. From an objective perspective, which claim makes more sense based upon our external view of the Pluto-Charon system?