{P : Sort u} →
  {c₁ c₂ c₁' c₂' : Lean.Meta.Grind.Arith.Cutsat.LeCnstr} →
    Lean.Meta.Grind.Arith.Cutsat.LeCnstrProof.combine c₁ c₂ =
        Lean.Meta.Grind.Arith.Cutsat.LeCnstrProof.combine c₁' c₂' →
      (c₁ = c₁' → c₂ = c₂' → P) → P