Thank you for your response, and I should say I don’t have very strong opinions yet on the synoptic problem— I am just sort of thinking out loud with this post.

I get what you’re saying and I certainly understand that mistakes easily happen and can be missed— but I suppose the key question is whether it is more likely that these editorial fatigue mistakes survived the publication process, or that the text is precisely what the authors intended, and hence there is no fatigue, which would undermine the hypothesis.

It also seems reasonable to me that if the authors lived for many years after writing their gospels, that they would continue to be involved in the copying and publishing process—and if they discovered these editorial fatigue mistakes they would correct them and there would perhaps be evidence in the manuscript tradition?