D1244 independent Z2-torsor audit
  bijections source->target: 2
  Z2-equivariant bijections: 2
  map 0 (s501): -1 -> 0.4375, +1 -> 0.5625, equivariant=True
  map 1 (mirror countermap): -1 -> 0.5625, +1 -> 0.4375, equivariant=True
  unique without basepoint: False
  VERDICT: NO SELECTOR: the supplied topology leaves two equally equivariant source-to-octant maps. s501 chooses one by definition.
  semantic_sha256: aa0660d4b32e6c44f50b43e25d84b78a0f60235d7744bf0f34b07e3594470b9f
