  This speculative argument proposes that within a physical, ponderable model
of space-time, anti-gravity may naturally arise. The central concept involves a
paradigm shift from `adding stuff' to `thinning out,' wherein the local
geometry of space-time, as perceived by embedded observers, plays a crucial
role. In this context, the equivalence principle holds, emphasizing the focus
on the intrinsic structure of space-time rather than interactions among
individual particles or quanta.
