(ι' α : Type (max u_1 u_2)) →
  (fib : ι' ⊕ α → Type (max u_1 u_2)) →
    (motive : (i : ι' ⊕ α) → fib i → Sort u_3) →
      (i : ι' ⊕ α) →
        (j : fib i) →
          ((i : ι') → (j : fib (Sum.inl i)) → motive (Sum.inl i) j) →
            ((i : α) → (j : fib (Sum.inr i)) → motive (Sum.inr i) j) → motive i j