[theaustinseven]

Yeah, I guess I see what you are trying to say. I just want to clarify when I say predictable, I mean that given a set of operations. No matter the order they come in, the results will be the same. This makes OT powerful in that everyone just needs the operations eventually in order to have a consistent document. The only middle ground that I could see that would allow predictability in the document, and help mitigate these silent errors would be to notify users of when they have both edited the same range before consistency was reached. This would catch "almost" any case that I think you are talking about, although would of course miss the situations in which semantic errors arise due to errors in very different parts of the document(e.g. referencing a figure 2.1, while someone changes that figure to 2.2), but these errors can still easily arise with a single editor, and so are not really unique to OT. I do think that it would be nice to have a solution to that problem though...