Understanding なぜかって


Consider

> じゃあ なぜ落とした？
>
> 丁寧に使い方まで書いて 間違って落としたなんて言うなよ
>
> **なぜかって？**
>
> 退屈だったから

In this context, what does なぜかって mean? And is it parsed as

  1. なぜ + かって, where かって is the て-form of some verb
  2. なぜ + か particle + って？




In your context, it's parsed as 2., i.e. って is the informal version of the
quotative particle と. The implicit part that is ommited would be 言う/聞く/問う:

> なぜか why?
>
> って[言う]？ you say

So the complete sentence would mean something along the lines:

> なぜかって[言う] "why?", you say?

Note that **there are two questions in the expression** , the first one inside
the quote なぜか, denoted by the particle か, and the second one is after de
implicit 言う, denoted by the question mark "?".

