If there were something outside reality that were real enough to topologically contain it, it would be intrinsic to reality (and therefore contained within it). We can make a similar statement regarding matter: if there were something outside matter that were material enough to contain it, it would to exactly that extent be intrinsic to matter. In order to accommodate matter, space must be potentially identical to it... must "share its syntax". In other words, matter doesn't "displace" space, but occupies it in perfect superposition...intersects with it. So space consists of material potential and is thus a "potential phase of matter". Denying this leads to a contradiction.