Correct. Our universe is 3D. This is completely and utterly true. However, it is not impossible to have a 4D universe. That is what I am suggesting here. A 4D game, or a game with 3-space as the main battle field, but with 4-space to jump across or move between membranes etc. It is possible.
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Why? Why would anybody have any problems with a mad scientist who wants to take over the world, remove Homo sapiens as the dominant species and live forever?
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