Thank you all for your help on my previous question concerning MWI (Interaction across many-worlds). Your answers have been helpful, even if they haven't actually made the picture much clearer They have at least made the debate clearer. I don't really understand all the "wave function" mumbo jumbo, so I have been trying to visualize just what is going on, and what wave function, entanglement, and collapse, et al, are all about. So I was considering Schrodinger's cat. If you and I set up the experiment as described, we create a condition of superposition for the cat, inside the box. Now if you open the box and look inside, and then close it again before I have a chance to see the outcome. What is the state of the cat? I can see how, for you, the cat is definitely either alive or dead. The cat is no longer in a state of superposition. But I still have no way of knowing the cat's condition for sure. I could ask you, but perhaps I'm a member of PETA sent to oversee your experiment, in which case you might well be lying, due to the fact that you don't want me to know the real state of the cat. For me, isn't the cat still in a state of superposition? Isn't the "collapse" of the wave function dependent upon the availability, to me, of the information about the state of the cat. I fail to see how your knowledge concerning the state of the cat, changes my potential knowledge of the state of the cat, and isn't that the key to wave function collapse? I have no way of knowing the state of the cat. The information is completely unavailable to me. Therefore, isn't the cat still in a state of superposition? But you looked at the cat, which means its wave function must have collapsed. So which is it? Has the wave function collapsed, remained, or both? But this raises another question, how can the cat be in a state of superposition for me, and not for you. We're standing right beside each other, how can the cat be in two different states at the same time? The obvious answer, it seems to me, is that it isn't, the cat is still in a state of superposition. But what does that mean concerning your condition then? It would seem that for me, you must be in a state of superposition too. Even though I'm looking right at you. You could be lying, or you could be telling the truth. Two opposite states. Under such conditions wouldn't you be in a state of superposition? After all, you could be lying, or you could be telling the truth. Two possibilities, existing at the same time. Is this possible? Anyway I have more questions, but I'll wait to read your answers to these questions and then hopefully I'll be able to answer any further questions on my own. Of course I'm always gonna have more questions.