Borges's Sense of Truth

Borhis writes, he met don raven ia pub back in london and said to him these or similar words. That or similar just leaps out of me, because there's no real unwin talking. Unwin is going to say whatever borhes tells him to say. He was he was not pinned to something. Thaits by definition. Why throw that in? To give a sense of authenticity - if one or two words are different, please excuse me. Which lends power ofa truth to the story. No borges reader would confuse that. Oh, yes, what a scholarly attitude. Of course, it is a little trick, but we get it.