Some recent experiments that provide support for the concept of topological doping in cuprate superconductors are discussed. Consistent with the idea of charge segregation, it is argued that the scattering associated with the "resonance" peak found in YBa_2Cu_3O_(6+x) and Bi_2Sr_2CaCu_2O_(8+ delta ) comes from the Cu spins and not from the doped holes.
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