∀ {α : Type u_1} [inst_1 : DecidableEq α] {g : Equiv.Perm α} {a : α} (w : α),
  1 ≤ (List.filter (fun x => decide (x = w)) [a, g a, g (g a)]).length →
    0 < (List.filter (fun x => decide (x = w)) [a, g a, g (g a)]).length