For any two mathematical structures, you can define a new one by combining all their elements and relations. Many structures on the master list are of this composite type, and when studying the Level IV multiverse, it makes sense to ignore them. This is because there are no relations connecting the two parts, which means that a self-aware observer in one of its parts will be forever unaware of and unaffected by the existence of the other part, so she can just as well act as though the other part didn’t exist—or wasn’t part of her mathematical structure. The only way in which composite
...more
