What does だっていい mean?


[![enter image description
here](https://i.stack.imgur.com/ApPqG.png)](https://i.stack.imgur.com/ApPqG.png)

" 先だって " appears to be a proper word but I don't see how it fits here?

"Which one... doesn't matter"?




先だって can be interpreted in several ways:

  1. **先だって【せんだって】** (先達て in kanji): "recently; a while ago" ([a lexicalized adverb](https://jisho.org/word/%E5%85%88%E3%81%A0%E3%81%A3%E3%81%A6))

> 先だってお送りした書類の件ですが、…  
>  Regarding the document we sent you earlier, ...

  2. **先立って【さきだって】** ≈ 先行して: te-form of [先立つ【さきだつ】](https://jisho.org/word/%E5%85%88%E7%AB%8B%E3%81%A4), "to go ahead; to precede"

> 一般販売に先立ってテスト販売を行う。  
>  Test sales will be conducted prior to general sales.

  3. **先【さき】だって** : 先 ("earlier; first") + だ (copula) + って (quotative)

> Sチケットを持っている人の方が先だって言ってた。  
>  He said the S-ticket holders were first.

  4. **interrogative + 先【さき】だって** : 先 ("earlier; first") + [だって](https://jisho.org/word/%E3%81%A0%E3%81%A3%E3%81%A6) ("even", "-ever")

In your case, it's 4. This だって is a particle used in the same way as だって as in
誰だって (whoever), どれだって ("whichever"), いつだって ("whenever"), etc. It's more
emphatic and colloquial than 誰でも, etc. See [this
question](https://japanese.stackexchange.com/q/50294/5010).

> どっちが先だっていーよ、もう。  
>  ≈ どちらが先でもいいよ、もう。  
>  Come on, whoever {comes earlier / goes ahead / does it first}, I'm fine.  
>  Hey, I don't mind whichever is first!

Note that 1 is a fairly formal adverb used in business exchanges, and it never
appears in informal conversation.

