Context: However Cornelius Clifford places his birth no earlier than 296 and no later than 298, based on the fact that Athanasius indicates no first hand recollection of the Maximian persecution of 303, which he suggests Athanasius would have remembered if he had been ten years old at the time. Secondly, the Festal Epistles state that the Arians had accused Athanasius, among other charges, of not having yet attained the canonical age (30) and thus could not have been properly ordained as Patriarch of Alexandria in 328. The accusation must have seemed plausible. The Orthodox Church places his year of birth around 297.

Question: What famous event happened in 303?
Answer: Maximian persecution

Question: What writing mentions the Arian accusation that Athanasius was under aged?
Answer: the Festal Epistles

Question: At what age was a man eligible to be ordained at Patriarch of Alexandria?
Answer: canonical age (30)

Question: When was Cornelius Clifford born?
Answer: Unanswerable

Question: What year did Cornelius Clifford attend the Maximian persecution?
Answer: Unanswerable

Question: When was Cornelius Clifford ordained as Patriarch of Alexandria?
Answer: Unanswerable

Question: What church does Cornelius Clifford belong to?
Answer: Unanswerable

Question: How old was Cornelius Clifford when he joined The Orthodox Church?
Answer: Unanswerable

Question: What famous event happened in 305?
Answer: Unanswerable

Question: What writing denies that the Arian accusation that Athanasius was under aged?
Answer: Unanswerable

Question: At what age was a woman eligible to be ordained at Patriarch of Alexandria?
Answer: Unanswerable

Question: What is the age of 20 called?
Answer: Unanswerable