∀ (motive : CategoryTheory.Limits.WalkingSpan → Sort u_1) (h_1 : Unit → motive none)
  (h_2 : Unit → motive (some CategoryTheory.Limits.WalkingPair.left))
  (h_3 : Unit → motive (some CategoryTheory.Limits.WalkingPair.right)),
  (match some CategoryTheory.Limits.WalkingPair.left with
    | none => h_1 ()
    | some CategoryTheory.Limits.WalkingPair.left => h_2 ()
    | some CategoryTheory.Limits.WalkingPair.right => h_3 ()) =
    h_2 ()