{motive : Mathlib.Tactic.BicategoryLike.Mor₁ → Sort u} →
  (t : Mathlib.Tactic.BicategoryLike.Mor₁) →
    ((t : Mathlib.Tactic.BicategoryLike.Mor₁) → Mathlib.Tactic.BicategoryLike.Mor₁.below t → motive t) →
      motive t ×' Mathlib.Tactic.BicategoryLike.Mor₁.below t