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These are the lyrics

> でも 全部わかってしまったらどうすればいいの.

My question regards the _ii no_ at the end. The translation I found was that
it means "But when I know everything, what do I do then?" So what does it mean
exactly?
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2015-10-15T06:06:21.650
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2015-10-15T19:29:09.547
2015-10-15T19:29:09.547
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song-lyrics
いいの? What does it mean?
I might say

> but even if I wound up knowing everything, what should I do then?

My reasons for this different suggestion are two-fold.

  1. しまう is a "helping verb" that means "wind up" or "end up"
  2. どうすればいい does literally mean "what would be good to do", but generally "what should I do?"
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2015-10-15T09:33:00.880
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2015-10-15T09:33:00.880
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の, with rising intonation, can be used to ask a question. Without rising
intonation, it can be used to answer a question. You may wish to research
"explanatory particles" which is what this is.

The question you quoted could be answered with:

> 全部わかってしまったら何もしなくていいの (If you wind up knowing everything, you should do
> nothing)

The question you quoted is equivalent (though with slightly different nuance /
politeness) to:

> でも 全部わかってしまったらどうすればいいのか (question particle か explicitly included)
>
> でも 全部わかってしまったらどうすればいいのですか (polite)
>
> でも 全部わかってしまったらどうすればいいんですか (の contracted to ん, to the best of my knowledge
> only if followed by だ or です)
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2015-10-15T14:09:34.700
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2015-10-15T15:48:30.273
2020-06-17T08:18:27.500
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