[Jan-Poo]

@chrono

Spoiler for Higurashi:

You kinda missed my point. I was making a reasoning about narrative necessities. If you are an author like Ryukishi and you want to write a story where the same event repeats itself many times but with different variations, you need to come up with an explanation.
In Higurashi it was a many-world interpretation. With that the "how it is possible that we see many incompatible version of the same story" is explained. However Ryukishi had also to introduce certain "rules" in order to limit the kind of universes that can possibly exist.

You seem to make the mistake to think that with a many-world interpretation you are still bound to law of physics by default. This is not necessarily true unless you are following a particular scientific interpretation and Higurashi isn't for many different reasons. A totally free many-world interpretation could even include universes where the law of physics are different, where magic exists and so on.

Now my point about Umineko is the fact that the idea that a Game Master can create a layer of fake scenes over a real scenario, is enough by itself to explain why you see many different variations of the same event. There is not a real narrative necessity to add another theory to explain what can be explained already with what you have.

This doesn't mean that the many-world interpretation "doesn't work" but simply that there is no real necessity for it. And you can say that Ryukishi still used the many-world interpretation of Higurashi for Umineko even if it wasn't strictly necessary. But personally I see this "non necessity" as a very good point to believe it wasn't used.

@Judoh
there are a few times where the selection of a kakera is mentioned. That's when Bernkastel tells that she "will choose the most terrible kakera" to send her piece to.

However such a thing was never mentioned by Beatrice.

Even so the selection of kakera isn't incompatible with the author theory, since you can choose and read whatever story is already existent. Rather it's the many-world interpretation that it's incompatible with the creation of kakera, unless you assume someone has God-like powers.

Now there is a particular thing that I noticed about Bern and Lambda. Depending on your interpretation, assuming Lambda and Bern are telling the truth about themselves then they either:

1) "Lived" for an incredible amount of time among many real worlds. So they must have seen humanity and their histories in any possible way.

2) Are meta-existences that have traveled among many different stories created by humans. Their experiences are therefore tied to fictional worlds.

In EP5 Hideyoshi makes a comparison with an historical event in order to explain his theory about Kinzo's situation to Eva. People draw facts from their favorite field of knowledge when they make comparisons, and in fact we know that Hideyoshi has always been fascinated by the sengoku era.

But what about Bern and Lambda? What do they most often talk about? What are most often referencing to and with a clear assumption that the other knows perfectly what they are talking about?

Not surprisingly (for me): works of fiction, mainly books.