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いい!? これからもし私たちが空へ行くというのなら....

Is there any difference if I replaced it with なら? If there isn't, is there a
sentence where it wouldn't be interchangeable?
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2023-01-12T18:27:02.360
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2023-02-13T18:15:10.273
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question
grammar
How is というなら different from なら?
If you'd like to replace nami's sentence of 行くというのなら with 行くなら, the meaning is
not changed much. Both 普通形(i.e. common type)（の）なら and 普通形なら can be used to
give suggestion/advice.

But in my experience, the first one is often used to express a rather strong
attitude, i.e. firm advice.
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2023-01-13T02:41:02.180
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answer
Actually, all 行くなら / 行くというなら / 行くのなら / 行くというのなら are grammatically possible
here. I mean, grammatically allowed but each has its own meaning.

  * ～行くなら: _if we (will / are going to) go..._  
Yes, this is very straightforward. The non-past form tends to mean near
future.

  * ～行くというなら: _under the condition that we go... / if you insist we go..._  
`V というなら` is, in most cases, an idiom that means either of the following:

    1. "[an expression that tells it is okay/allowed] ... only if V"
    2. "if somebody insists to V"

However, neither of them fits well in this context.

  * ～行くのなら: _if (there is) the fact that we go... / if the one (where) we go..._  
の is a general nominalizer, accepting roughly two types of interpretation:

    1. apposition: "the fact of [predicate]"
    2. relative: "something or somebody that [predicate] / that is [predicate]-ed / with/to/from... which [predicate]"

And if we take the former understanding, it yields the convoluted first
translation above; but it is in turn, from a learner's perspective,
combination of `行く + のだ + [conditional]`, which can be practically translated
as "if we are bound/decided to go..."

  * ～行くというのなら: _if (there is) the fact that we say we go..._  
The translation is even more enigmatic now :P, but here the point is that the
extra という works in two ways. Firstly, it can eliminate the "relative" reading
from bare `V のなら` to unambiguously mean the nominalization of the action.
Secondly, it adds a little flavor of quotation という, which effectively
introduces the nuance of **subjunctive mood** i.e. mentioning a hypothetical
situation.

In conclusion, a cleaner answer would be like:

> もし私達が空へ行くなら  
>  _if we go up into the sky_

versus

> もし私達が空へ行くというのなら  
>  _if we **are supposed to** go up into the sky_  
>  or  
>  _**in the event that** we go up into the sky_
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2023-01-13T12:31:42.680
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answer