(motive : DoResultPR Unit PUnit.{1} PUnit.{1} → Sort u_1) →
  (r : DoResultPR Unit PUnit.{1} PUnit.{1}) →
    ((a : Unit) → (u : PUnit.{1}) → motive (DoResultPR.pure a u)) →
      ((b u : PUnit.{1}) → motive (DoResultPR.return b u)) → motive r