I will try to keep things brief. I am trying to understand what is considered interpretation. Imagine we have a totally isolated and complex quantum system in a fixed initial state which we can prepare with essentially perfect fidelity. Suppose that this system is macroscopic in which small subsystems are totally decoherent and classical and life exists. If we now make measurements on this system, then according to the usual prescription we will find a variety of outcomes. For example, if a living being inside the system measures a spin 1/2 particle in their world and we then measure them, then we would find that sometimes they found spin up and sometimes spin down. In this sense the same state describes two different experiences for the living being. Except for the absurd level of control and isolation being assumed here, can we all agree that this is what quantum mechanics predicts? (Quantum mechanics here including the usual measurement rule that describes so well what occurs in our laboratories.) My real question is this: where does interpretation come in? Is it just a matter of calling the state vector "really real" versus a "statistical description" versus ... or is there something more to it? If we are the living being and we believe our isolated world is described by a unitarily evolving state vector, then doesn't quantum mechanics (if we take it completely seriously) force us to conclude that the state of the world describes multiple possible experiences for beings similar to us? Is this trivial observation what it usually called "many-worlds"?