{motive_1 : Lean.Meta.Grind.Arith.Linear.RingEqCnstr → Sort u} →
  {motive_2 : Lean.Meta.Grind.Arith.Linear.RingEqCnstrProof → Sort u} →
    (t : Lean.Meta.Grind.Arith.Linear.RingEqCnstrProof) →
      ((t : Lean.Meta.Grind.Arith.Linear.RingEqCnstr) → t.below → motive_1 t) →
        ((t : Lean.Meta.Grind.Arith.Linear.RingEqCnstrProof) → t.below → motive_2 t) → motive_2 t