Probably the recognition and appointment of elders was simply the transfer from the synagogue to the Church of a usage which was regarded as essential among Jews; and the Gentile churches naturally followed the example of the Jewish Christians.
This may not be logical, but long usage has made it permissible or even necessary.
I doubted that, as Feynman was precise in his usage of words.
And the same usage went on after the Conquest; the use of English becomes gradually rarer, and dies out under the first Angevins, but it is in favour of Latin that it dies out.
In modern usage " fowl," except in " wild-fowl " or " water-fowl," is confined to domestic poultry.