{α : Type u_3} →
  [h : TopologicalSpace α] →
    {motive : PolishSpace α → Sort u} →
      (t : PolishSpace α) →
        ([toSecondCountableTopology : SecondCountableTopology α] →
            [toIsCompletelyMetrizableSpace : TopologicalSpace.IsCompletelyMetrizableSpace α] → motive ⋯) →
          motive t