{α : Sort u_1} →
  {s : Setoid α} →
    (a₁ a₂ : α) →
      (motive : Decidable (a₁ ≈ a₂) → Sort u_2) →
        (x : Decidable (a₁ ≈ a₂)) →
          ((h₁ : a₁ ≈ a₂) → motive (isTrue h₁)) → ((h₂ : ¬a₁ ≈ a₂) → motive (isFalse h₂)) → motive x