誰是誰非 [谁－谁－]

Jyutping seoi2 si6 seoi2 fei1
Pinyin shuí shì shuí fēi

Definitions (Wiktionary)
  1. phrase, idiomatic
    who is right and who is wrong
    (syn.) 孰是孰非, 誰對誰錯, 谁对谁错