how? (emphatic question)岂no不是 asks a rhetorical question expecting agreement — "wouldn't that be …?, isn't that …?" The speaker already knows the answer.
Cấu trúc: 岂不是 + Rhetorical Question
they他们don't不come来wouldn't that be岂不是even更better好?
Wouldn't it be even better if they didn't come?
you你doing it这样this way做aren't you just岂不是making给yourself自己找trouble麻烦?
Aren't you just making trouble for yourself?
Remember: how? (emphatic question)岂no不是 = a literary "wouldn't that be…?!" (how? (emphatic question)岂 = "how could it not") — the answer is taken for granted, so it argues a point rather than asks (they他们not不to come来how? (emphatic question)岂no不是更好? = "surely that'd be better").
Cẩn thận
- It's rhetorical — don't expect (or give) a literal yes/no.