V.R295 — Timeline for the topology test

The QNM test for black hole topology (S^2 vs T^2) requires third-generation gravitational wave detectors (2030s-2040s). The EHT polarization test may become feasible with next-generation EHT in the early 2030s. This is the seam with the longest timeline but potentially the most dramatic payoff: confirmed T^2 topology would be decisive evidence for tau.