その方法までは解読できません the role of まで and the meaning of the entire line


I have the following situation in some fiction I'm reading. Person B comes to
a world looking to do something. Person A arrives afterward looking for B. As
soon as A arrives she starts monologuing about probable B's intentions.
Something along the lines "She'll first go for 'group of people' and after
contacting them she'll go for 'Plot relevant thing' that somehow ended up here
and try to acquire and bring it back home."

After recounting what she thinks B's plan/objective (目的) is she says the
following line:

> その方法までは解読できませんでしたが
>
> こんな遠い世界の情報収集なんて
>
> B独りでは無理でしょうし…

As of now it seems she is saying:

> Up until that method/plan it's undecipherable (the rest of the data) but it
> seems plain that it B couldn't have gathered this much info on so far away a
> world alone...

The thing that bothers me is that その方法までは because I'm not sure what that is
supposed to convey. I'm assuming that その方法 is the plan she just described. And
so she is basically saying that everything before that plan in the database is
unreadable. But it kinda feels strange to say UP UNTIL in this kind of
context.

So, am I right oooooorrr.....




その方法 should be simply "the method for (achieving) that". So there is a
contrast between "the plan (itself)" and "the method to complete the plan". In
other words, she's saying she could decipher what B wanted to do, but not
_how_ B could achieve it. (I'm assuming the context you provided is reliable.
If you want ask about what その refers to, please do not omit the previous
sentences in Japanese...)

This まで is "to the point", "as far as", "to an extent". In positive sentences
it can be simply translated as "even". See
[this](https://j-nihongo.com/made/).




その方法 should be simply "the method for (achieving) that". So there is a
contrast between "the plan (itself)" and "the method to complete the plan". In
other words, she's saying she could decipher what B wanted to do, but not
_how_ B could achieve it. (I'm assuming the context you provided is reliable.
If you want ask about what その refers to, please do not omit the previous
sentences in Japanese...)

This まで is "to the point", "as far as", "to an extent". In positive sentences
it can be simply translated as "even". See
[this](https://j-nihongo.com/made/).

