It's definitely A (and not something else)
This expression is used to confirm that it's A.
2
こんなに頭が痛くて、病気でなくてなんだろう。
My head hurts so much I must be sick.
2
あんなに彼女に冷たくされて、これが失恋でなくてなんだろう。
To be treated so coldly by her, this must be a broken heart.
Getting the sentences
Construction
(Elements in parentheses are optional.)
Basic Examples:
愛でなくて何だろう (must be love)
Where this grammar is found
User notes
Discussion about this grammar
