Ehhh...I'm more trying to operate within the lines of the story and how I would think it would most satisfyingly come to an end (IE marrying on person and living with the rest, leaving the bride ambiguous, etc.)
I'm trying to avoid things like "word of god" or extra-textual evidence because of "Death of the Author" and am merely going off the information we have currently what we know from the story. I fully admit that this isn't a full understanding but a prediction based on textual evidence. No need to be so bellicose about it. This isn't me self-inserting a fantasy or trying to "imagine myself in a harem scenario," that's just a baseless assumption. Rather I'm trying to cite pieces of text and events that foreshadow my argument within the text. The closest I got was referencing the Japanese title which is most literally "five-split bride" or "quintile bride." I admit that this may refer to them all having an equally likely chance, but then my argument still stands, does it not? It may refer to them all having the same chance, in which case why make a distinction, or it may refer to them all being five-parts of a whole, which is a major running theme of the work. You seem to scoff at this idea but this is referenced repeatedly whenever the girls split.
But to address your actual points, there's definitely a case to be made citing sources that they're all going to play some major role in the marriage, and there's a lot of textual evidence to support an ending where they live together or something similar to it then not. There's much less evidence supporting each individual girl then it is the girls as a whole. Mostly because what can be said of one can broadly be said of another in terms of evidence of having a conclusive relationship.
Secondly, most of these arguments are inserting points I have not made, such as saying "there's multiple wedding dresses" vs "there's exactly 11 so he's gonna marry 11 people." I'm saying it's an interesting detail to include if nothing else and serves to support an existing argument but is not conclusive in itself, just as the big deal made of the festival finding your "loved one."
Additionally, your points seem to rely on presumptions and "word of god." I reject the idea that authorial word is the be-all and end-all of any and all discussion because of principles like "Death of the Author" and other literary principles. I don't care what the author may have said in interviews if the work seems to contradict that message, and if there's solid arguments to be made against it.
Finally, your weakest points tend to be presuming things such as "it would be even worse because everyone wants to be THE ONE!" or "pretending to be one another is just things twins do!" Without seeing things in the larger context of the work. These seem to be very much not based on anything that you can cite in text as reoccurring or thematically relevant.
I'd avoid you stop acting so vindictive and aggressive and be more attentive in your points. A well-sourced and well-constructed argument is going to be much more operational here than needlessly trying to blow me off by saying that I somehow want to live my fantasies through MC-kun (which is not my intention and nor have I ever claimed so.) It seems you have more issue with the fact the argument is being made in the first place then the argument itself, and it seems childish and simplistic to reject the idea entirely. Granted I could have gone through the additional evidence to cite chapters and specific passages that seem to support my claim, but there's a limit to how much you can do in a given amount of time on some internet forum for nerds like us. This is just one theory of a possible chain of events. I would actually prefer an ambiguous ending with little hints and touches because I think the wedding is irrelevant compared to the development of the characters and their interactions with one another, but I know that's unlikely, so I tried to see what the most likely ending was given the information I had available at time of writing.
@InvinCybul