The authors of the gospels were showing off their vast and versatile knowledge of the language and used two interchangeable words in the same sentence, just to show off.
Rrrright.
You are showing complete ignorance of how Koine works.
If you don't believe me look up the Baptist minister John Broadus from 1886. He wrote in his "Commentary of Matthew, Valley Forge PA Judson Press pg 355" that any distinction was limited to poetry.
On page 356 he demonstrates that the rabbinical language of that time did not draw a distinction between the two words.
In John Calvin's New Testament Commentaries The Harmonies of the Gospels Matthew Mark, and Luke Vol. 2 Translated by T.H.L. Parker wrote " I grant that in Greek Peter(Peteros) and stone (Petra) mean the same thing, save that the first word is Attic[From the Attica region}, the second from the common tongue.
James B. Shelton associate professor in the School of Theology and Missions of Oral Roberts University in Tulsa OK In his Letters to Authors, October 21, 1994 said almost the exact same thing.
Get yourself a copy of Jesus, Peter, and the Keys, by Butler Dahlgren and Hess. and you will see many more quotes from noted Protestant scholars saying the exact same thing.
>> “On page 356 he demonstrates that the rabbinical language of that time did not draw a distinction between the two words.” <<
.
truly absurd as an argument why anyone would use both to say the same thing in the same sentence.
You are grasping at straws.