So in isolating a system so that it is in superposition in a volume of space, why is it the inside of the box gains coherence and the outside doesn't? It seems to me either the inside and outside have non-symmetric properties, coherence is limited to a maxium volume or density of decoherent particles. The cat inside the box (for instance) does not hypothesize that the outside observers are in superposition, why not? What is different inside and outside the box? Does coherence begin but run into too great of density/volume of stuff and coherence simply can't take hold and fade away outside the box? Clarifications?