Interpolations and Textual Corruptions: The Blurry Lines

After the past two posts, I am now in a position to answer the question that led to this brief hiatus in my discussion of the afterlife, involving the first two chapters of the Gospel of Luke.  To refresh your memory, here is the question:   QUESTION: If, in your suspicion, the original Gospel of Luke began at 3:1 and the infancy narrative found in 1:5-2:52 is a later addition, do you think that should be indicated in NT reconstructions and translations in a way similar to how Mark 16:9-20 is often bracketed?   RESPONSE: Different scholars will have different opinions on this question, in no small measure because the majority of scholars (I would imagine) are reluctant to say that Luke 1-2 were originally lacking from the Gospel.   But suppose the majority were convinced?   Would they say that brackets should be placed around the story, as happens, typically, with passages otherwise recognized as probably not belonging in the New Testament, such as the ending of Mark’s Gospel (Mark 16:9-20) or the story of the [...]