(motive : Lean.FVarId × Lean.Compiler.LCNF.Param Lean.Compiler.LCNF.Purity.pure → Sort u_1) →
  (x : Lean.FVarId × Lean.Compiler.LCNF.Param Lean.Compiler.LCNF.Purity.pure) →
    ((fvar : Lean.FVarId) → (snd : Lean.Compiler.LCNF.Param Lean.Compiler.LCNF.Purity.pure) → motive (fvar, snd)) →
      motive x