OK here's a hypothetical situation in order to tease out a query that is bugging me... We have a cat, this cat has a bomb in it that is wired to it's brain and when brain death is detected, the cat explodes (you probably see already where I'm going with this). Unknown to the experimentalists, this cat has been substituted for the cat they were going to use in the thought experiment they were setting up with the box, the cyanide and the radio active atom plus detector and switch. In the room are only the scientists who do not know the cat has been switched, outside the room in a sound proof cubicle are some other scientists who do know the cat has been switched. Obviously if the cat is dead there's going to be exploded cat and no one is going to have to actually peer into the box to collapse the wave. What is the situation here, with regards to the superposition of the dead and alive cat, where the box has not exploded and those in the room don't know about the bomb, and how does it change if someone who does know walks into the room.