According to Waitz, F1's age makes it the most reliable of the Historia's codices, a view which has been challenged by Antonio Zanella and Dante Bianchi, both of whom hold that the F1 does not correctly reflect Paul's original.
Waitzi järgi teeb F1 vanus temast teose kõige usaldusväärsema koodeksi; sellele on aga vaielnud vastu Antonio Zanella ja Dante Bianchi, kelle järgi ei peegelda F1 Pauluse originaali korrektselt.