97692
The phrase is part of this following line:

> 普段の生活の中に埋もれている何気ないことなど気にも留めないし、知覚したとしてもすぐに忘れるか、脳が処理をしないかのどちらかなんだ。

Actually I'm also unsure about the role and meaning of the か in the second to
last clause too, but, in case it is unrelated to the clause I cited, I thought
the meaning would be something on the lines of "The brain decides on what
things to remember": I interpreted both か as "nested questions", so it would
be something like "the brain thinks どちらか with 処理をしするか処理をしないか as options.

I think the reasoning is pretty convoluted, but it's the only thing I could
come up with. I hope somebody may help me. Thanks in advance.
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2022-12-18T01:26:02.790
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translation phrases interpretation
Help with understanding roles and meaning of this phrase: 脳が処理をしないかのどちらかなんだ
か is not a question marker but a part of the structure ―か―かどちらか=either - or -.
([選択](https://dictionary.goo.ne.jp/word/en/%E3%81%8B/#je-9558))

The structure of the whole sentence is 'A and (IF B, C or D)', where

  * A=普段お生活の中に埋もれている何気ないことなと気にも留めない
  * B=知覚した
  * C=すぐに忘れる
  * D=脳が処理をしない.

So 脳が処理をしない itself is one of the options that happen.

* * *

Roughly, it means: _(The subject) doesn't case daily things and, even if (the
subj.) perceives them, (the subj.) forgets it immediately or (the subj.'s)
brain does not process them_.
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2022-12-18T02:25:48.037
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answer
普段の生活の中に埋もれている何気ないこと(など) is the topic of this sentence (は is replaced by など).
Three predicates, 1) 気にも留めない, 2) 知覚したとしてもすぐに忘れる, and 3) 脳が処理をしない are
associated with it. The last two items are in the `XかYかのどちらか` ("either of X or
Y") construction. This か is used to mark options (e.g., 生か死か "dead or alive";
戦うか逃げるか "fight or flight"), not to form an embedded question.

So the basic structure of this sentence is:

  * TopicなどAし、B **か** C **かのどちらか** なんだ。  
As for something like Topic, (it's) A, and (it's) **either of** B **or** C.

Where:

  * Topic = 普段の生活の中に埋もれている何気ないこと
  * A = 気にも留めない
  * B = 知覚したとしてもすぐに忘れる
  * C = 脳が処理をしない

> [普段の生活の中に埋もれている何気ないこと]Topicなど[気にも留めない]Aし、[知覚したとしてもすぐに忘れる]B **か**
> 、[脳が処理をしない]C **かのどちらか** なんだ。
>
> [We don't pay attention]A to [trivial things buried in our daily
> lives]Topic. It's **either** [that we forget them at once even if we
> perceive/recognize them]B **or** [that our brains don't (even) process
> them]C.
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2022-12-19T00:17:29.050
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answer