∀ {α : Type u_1} [inst : Std.PRange.UpwardEnumerable α] [inst_1 : LE α] [inst_2 : DecidableLE α]
  [Std.PRange.LawfulUpwardEnumerable α] [Std.Rxc.IsAlwaysFinite α],
  WellFounded fun it' it => it'.IsPlausibleSuccessorOf it