I meant "realism". That covers everything from the appearance of real to the really real.
We can't read the author of gMark's mind, but we can see how at least two, and I think three, persons read it. Notice how the authors of Matthew and Luke (and John, too!!) felt free to change and rewrite it.
It is worth keeping in mind, too, that even obvious fiction was frequently structured around prophecies and their fulfillment, and would also include historical persons as part of the fictional narrative. It was all part of the realism and drama.