∀ {α : Type u_1} [inst : MeasurableSpace α] (s : MeasureTheory.SignedMeasure α),
  MeasurableSet ⋯.choose ∧
    MeasureTheory.VectorMeasure.restrict 0 ⋯.choose ≤ MeasureTheory.VectorMeasure.restrict s ⋯.choose ∧
      MeasureTheory.VectorMeasure.restrict s ⋯.chooseᶜ ≤ MeasureTheory.VectorMeasure.restrict 0 ⋯.chooseᶜ