∀ {Ω : Type u_1} {E : Type u_2} [inst : MeasurableSpace E] {m : MeasurableSpace Ω} {ℙ : MeasureTheory.Measure Ω}
  {μ : MeasureTheory.Measure E} (X : Ω → E), ¬MeasureTheory.pdf X ℙ μ =ᵐ[μ] 0 → AEMeasurable X ℙ