The question whether those claims and schemes and avengings, in the same way as mentioned in the historical sources, were actually proposed by Ardashir himself or were later attributed to him as the founder of the empire has still remained without answer due to the lack of sufficient sources; though the attribution of these claims to Ardashir after his lifetime seems more logical. According to these, it is undoubtedly true that Ardashir's grandiose views about policy and relations with the outside world had formed based on rebooting and repeating the Achaemenids' successes. However, the Sasanians' knowledge of the Achaemenids were superficial and vague information and did not have a regular and historical basis. About that, Richard Frye and Daryee believe that the section of the Arabic-Persian sources (like Al-Tabari) that contain the Sasanian history since the beginning until the age of Khosrow I should be looked at suspiciously; they consider this suspicious look at texts like Kar-Namag i Ardashir i Pabagan too. The suspicious look has been due to that most of the Iranian history sources were edited in the age of Khosrow I and by the royal writers and clerics in order to accommodate their predecessors' history with then world view of the Sasanian empire and draw a picture of Ardashir idealistic and aligning with Khosrow's ideals in the best way.