I would point out that in any case they did not pre-exist as signs.
All must be archetypal; every truth must pre-exist to its perception.
Reality must pre-exist to every assertion for which truth is claimed.
But something of the Form or rational explanation (τῶν ἐν τῷ λόγῳ) must also pre-exist.
Now, individuals in the aggregate can possess no right which did not pre-exist ...