∀ {X : Type u_1} [t : TopologicalSpace X] {C D : Set X} [inst : Topology.RelCWComplex C D] [T2Space X] {A : Set X},
  A ⊆ C →
    IsClosed (A ∩ D) →
      (∀ (n : ℕ),
          0 < n →
            ∀ (j : Topology.RelCWComplex.cell C n),
              IsClosed (A ∩ Topology.RelCWComplex.openCell n j) ∨ IsClosed (A ∩ Topology.RelCWComplex.closedCell n j)) →
        IsClosed A