岂非

豈非
qǐfēi
wouldn't it be ... ?

CEDICT

  1. (formal, used to ask a rhetorical question) is it not the case that; is it none other than; is it possible that; could it be said that
  2. is it not the case that; is it none other than; is it possible that; could it be said that

Wiktionary

难道不是。表示反诘的语气。

重編國語辭典

Entry Composition

1 岂 qǐ how? (emphatic question)
2 非 fēi
  1. to not be; not
  2. wrong; incorrect
  3. non-; un-; in-; de-
  4. to reproach; to blame
  5. (coll.) to insist on; simply must