∀ {α : Type} [inst : DecidableEq α] [inst_1 : Hashable α] {n : ℕ} {aig : Std.Sat.AIG α} (a : α),
  (Std.Sat.AIG.RelabelNat.State.ofAIG aig)[a]? = some n →
    ∀ (a' : α), (Std.Sat.AIG.RelabelNat.State.ofAIG aig)[a']? = some n → a = a'