Part X · Evidence, Method and Record · Paper 16 of 40
“Gravitational and electromagnetic signals crossed 130 million light years and arrived 1.74 seconds apart. Both readings pass. Neither is distinguished.”
GW170817 constrains the speed of gravitational propagation to one part in 10¹⁵. The framework passes, and explains why the two speeds should match: one Plenum, one signal speed. The paper states plainly that an explanatory advantage is not evidence.