Once there was a conference of scholars investigating ancient history. They were considering the nationality of King Darius, mentioned in the Bible as Darius the Mede.
Some of those present took the different view that Darius was actually from Persia, whereas others were inclined to agree with the Bible that he was a Mede.
Tempers began to flare, until one wise professor said, "Let's not argue this! After all, one man's Mede is another man's Persian."