Throat Energy Density of a Morris-Thorne Wormhole Against a Maximum-Density Ceiling

A static Morris-Thorne throat of radius one metre requires a negative energy density of 5.36e+25 kilograms per cubic metre in mass-equivalent units. A maximum density for fermionic matter of 9.72e+57 kilograms per cubic metre, set by spin-torsion repulsion on the neutron branch, lies 32.3 orders of magnitude above that requirement, so the ceiling does not exclude the throat: the two numbers are separated by a factor that dwarfs every other scale in the problem. The radius at which the required throat density would reach the ceiling is 7.43e-17 metres, far below any macroscopic geometry. Even a kilometre-wide throat needs only 5.36e+19 kilograms per cubic metre. The verdict of this computation is therefore plain: judged on density alone the geometry is comfortably admissible, and whatever excludes a traversable throat must be found in integrated quantities, total mass, averaged energy conditions and stability, not in a local density cap. All results are computed from stated assumptions, not measured.