Abstract
In this paper I explore the implications of the notion of hyperspace for scientific realism and the sort of theoretical activity represented by the attempt to arrive at a literal characterization of the noumenal realities that natural science, especially physics, investigates. I conclude that whether or not this enterprise is possible, its being so depends on factors outside of our control for which no internal means of correction is possible. Only a very attenuated form of scientific realism, then, can reasonably be endorsed by sober philosophy.