Yes I see the motivation there. MWI may seem like an OK alternative to wave functions actually changing in the presence of consciousnesses, but not in their absence. I guess I've never really believed the consciousness was an important part of it. Take for example setting up a two-slit experiment with a slow stream of electrons launched at it and a recording electron detector array beyond the slits. One would have a time series of locations the electrons hit the array which would probabilistically over time build a two-slit diffraction pattern, but in which each electron particle was identified with where on the array it ended up. Suppose you set this up in a room. In one version you send an observer in 3 days later to look at what happened, and you see all those evidences of each electron wavefunction collapse into a position eigenstate on the array detector. In the other version you don't send someone in to the room until 10 years later, at that point the observer sees the historical record of all those wave function collapses. Finally there is a version where you never send someone in to the room. It has always been my opinion that whatever collapses happened actually happened at the time recorded for each electron wave function hitting the screen. The version of the Copenhagen interpretation used here seems to go with the idea that the entire room including the detector array and the equipment used to record its results exist in a quantum superposition of all the wavefunctions UNTIL the observer finally goes in to the room, at which point they collapse in to a state with all the data stored showing one allowed version of the historical record of electron collapses. Very intriguing. There is literally no way in this experiment to distinguish between "the wave functions collapsed as the electron hit the detector, that I came along later to see the record of it isn't what caused the collapse" and "all possible histories of that room were swirling around in a qua